Description
Impact:
Undici's HTTP/1.1 client is vulnerable to response queue poisoning on reused keep-alive sockets. An attacker-controlled upstream server can inject an unsolicited HTTP/1.1 response onto an idle socket after a request completes. When the client dispatches the next request on that socket, it associates the injected response with the new request, causing responses to be delivered to the wrong requests.
This requires an attacker-controlled or compromised upstream HTTP/1.1 server and keep-alive connection reuse.
Patches:
Upgrade to undici v6.26.0, v7.28.0 or v8.5.0.
Workarounds:
Disable keep-alive connection reuse by setting keepAliveTimeout: 0 on the Client or Pool.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| undici | undici | < 6.26.0, 7.0.0 – < 7.28.0, 8.0.0 – < 8.5.0 | 6.26.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | node-undici | 8.5.0+dfsg+~cs3.2.0-1 | — |
| Debian 13 | node-undici | No fix yet | — |
| Debian 12 | node-undici | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | node-undici | No fix yet | — |
| Ubuntu 26.04 LTS | node-undici | No fix yet | — |
| Ubuntu 25.10 | node-undici | No fix yet | — |
| Ubuntu 24.04 LTS | node-undici | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | nodejs +5 | 1:22.23.1-2.el10_2 | RHSA-2026:35842 |
| RHEL 10 | nodejs-npm | 1:10.9.8-1.22.23.1.2.el10_2 | RHSA-2026:35842 |
| RHEL 10 | nodejs24 +4 | 1:24.18.0-1.el10_2 | RHSA-2026:35841 |
| RHEL 10 | nodejs24-npm | 1:11.16.0-1.24.18.0.1.el10_2 | RHSA-2026:35841 |
| RHEL 9 | nodejs +4 | 1:22.23.1-1.module+el9.8.0+24457+996af7aa | RHSA-2026:35892, RHSA-2026:35891 |
| RHEL 9 | nodejs-nodemon | 3.0.1-1.module+el9.8.0+24156+bb41d456 | RHSA-2026:35892, RHSA-2026:35891 |
| RHEL 9 | nodejs-packaging +1 | 2021.06-6.module+el9.8.0+24156+bb41d456 | RHSA-2026:35892, RHSA-2026:35891 |
| RHEL 9 | npm | 1:10.9.8-1.22.23.1.1.module+el9.8.0+24457+996af7aa | RHSA-2026:35892, RHSA-2026:35891 |
| RHEL 9 | v8-12.4-devel | 3:12.4.254.21-1.22.23.1.1.module+el9.8.0+24457+996af7aa | RHSA-2026:35892 |
| RHEL 9 | v8-13.6-devel | 3:13.6.233.17-1.24.18.0.1.module+el9.8.0+24456+b244c3b4 | RHSA-2026:35891 |
| RHEL 8 | nodejs +4 | 1:22.23.1-1.module+el8.10.0+24500+8eb51621 | RHSA-2026:41947, RHSA-2026:39868 |
| RHEL 8 | nodejs-nodemon | 3.0.1-1.module+el8.10.0+24500+8eb51621 | RHSA-2026:41947, RHSA-2026:39868 |
| RHEL 8 | nodejs-packaging +1 | 2021.06-6.module+el8.10.0+24190+49a46c75 | RHSA-2026:41947, RHSA-2026:39868 |
| RHEL 8 | npm | 1:10.9.8-1.22.23.1.1.module+el8.10.0+24500+8eb51621 | RHSA-2026:41947, RHSA-2026:39868 |
| RHEL 8 | v8-12.4-devel | 3:12.4.254.21-1.22.23.1.1.module+el8.10.0+24500+8eb51621 | RHSA-2026:41947 |
| RHEL 8 | v8-13.6-devel | 3:13.6.233.17-1.24.18.0.1.module+el8.10.0+24481+7a71fac8 | RHSA-2026:39868 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | nodejs24 +6 | 24.18.0-0.3.hum1 | RHSA-2026:38236 |
| Red Hat Hardened Images 1 | nodejs24-npm | 11.16.0-1.24.18.0.0.3.hum1 | RHSA-2026:38236 |
| Red Hat Hardened Images 1 | nodejs26 +6 | 26.5.0-1.3.hum1 | RHSA-2026:38009 |
| Red Hat Hardened Images 1 | nodejs26-npm | 11.17.0-1.26.5.0.1.3.hum1 | RHSA-2026:38009 |
| Red Hat Hardened Images 1 | v8-13.6-devel | 13.6.233.17-1.24.18.0.0.3.hum1 | RHSA-2026:38236 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | nodejs +4 | 1:22.23.1-2.el10_2 | ALSA-2026:35842 |
| AlmaLinux 10 | nodejs-npm | 1:10.9.8-1.22.23.1.2.el10_2 | ALSA-2026:35842 |
| AlmaLinux 10 | nodejs24 +4 | 1:24.18.0-1.el10_2 | ALSA-2026:35841 |
| AlmaLinux 10 | nodejs24-npm | 1:11.16.0-1.24.18.0.1.el10_2 | ALSA-2026:35841 |
| AlmaLinux 9 | nodejs +4 | 1:22.23.1-1.module_el9.8.0+276+8b329b47 | ALSA-2026:35892, ALSA-2026:35891 |
| AlmaLinux 9 | nodejs-nodemon | 3.0.1-1.module_el9.7.0+208+fb06c0ab | ALSA-2026:35892, ALSA-2026:35891 |
| AlmaLinux 9 | nodejs-packaging +1 | 2021.06-6.module_el9.7.0+209+ecf6523e | ALSA-2026:35892, ALSA-2026:35891 |
| AlmaLinux 9 | npm | 1:10.9.8-1.22.23.1.1.module_el9.8.0+276+8b329b47 | ALSA-2026:35892, ALSA-2026:35891 |
| AlmaLinux 9 | v8-12.4-devel | 3:12.4.254.21-1.22.23.1.1.module_el9.8.0+276+8b329b47 | ALSA-2026:35892 |
| AlmaLinux 9 | v8-13.6-devel | 3:13.6.233.17-1.24.18.0.1.module_el9.8.0+277+61fc613e | ALSA-2026:35891 |
| AlmaLinux 8 | nodejs +4 | 1:22.23.1-1.module_el8.10.0+4231+1bf2f855 | ALSA-2026:41947, ALSA-2026:39868 |
| AlmaLinux 8 | nodejs-nodemon | 3.0.1-1.module_el8.10.0+3956+47c9ee9f | ALSA-2026:41947, ALSA-2026:39868 |
| AlmaLinux 8 | nodejs-packaging +1 | 2021.06-6.module_el8.10.0+4086+70facd4a | ALSA-2026:41947, ALSA-2026:39868 |
| AlmaLinux 8 | npm | 1:10.9.8-1.22.23.1.1.module_el8.10.0+4231+1bf2f855 | ALSA-2026:41947, ALSA-2026:39868 |
| AlmaLinux 8 | v8-12.4-devel | 3:12.4.254.21-1.22.23.1.1.module_el8.10.0+4231+1bf2f855 | ALSA-2026:41947 |
| AlmaLinux 8 | v8-13.6-devel | 3:13.6.233.17-1.24.18.0.1.module_el8.10.0+4228+2938bc94 | ALSA-2026:39868 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | nodejs22 | 1:22.23.1-2.el10_2 | RLSA-2026:35842 |
| Rocky Linux 10 | nodejs24 | 1:24.18.0-1.el10_2 | RLSA-2026:35841 |
| Rocky Linux 9 | nodejs-nodemon | 3.0.1-1.module+el9.7.0+40022+9ecc286c | RLSA-2026:35892, RLSA-2026:35891 |
| Rocky Linux 9 | nodejs-packaging | 2021.06-6.module+el9.7.0+40052+e32ea525 | RLSA-2026:35892, RLSA-2026:35891 |
| Rocky Linux 8 | nodejs | 1:24.18.0-1.module+el8.10.0+40252+a58646bc | RLSA-2026:39868 |
| Rocky Linux 8 | nodejs-nodemon | 3.0.1-1.module+el8.9.0+1760+903d54b9 | RLSA-2026:41947, RLSA-2026:39868 |
| Rocky Linux 8 | nodejs-packaging | 2021.06-6.module+el8.10.0+40048+6d99f608 | RLSA-2026:41947, RLSA-2026:39868 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | nodejs22 | 22.23.0-150700.3.12.1 | SUSE-SU-2026:2695-1 |
| SLES 15 SP7 | nodejs24 | 24.17.0-150700.15.11.1 | SUSE-SU-2026:2633-1 |
| SLES 15 SP6 | nodejs20 | 20.20.2-150600.3.21.1 | SUSE-SU-2026:3929-1 |
| SLES 15 SP6 | nodejs22 | 22.23.0-150600.13.18.1 | SUSE-SU-2026:2647-1 |
| SLES 15 SP5 | nodejs18 | 18.20.8-150400.9.39.1 | SUSE-SU-2026:4261-1 |
| SLES 15 SP5 | nodejs20 | 20.20.2-150500.11.30.1 | SUSE-SU-2026:3930-1 |
| SLES 15 SP4 | nodejs16 | 16.20.2-150400.3.42.1 | SUSE-SU-2026:4355-1 |
| SLES 15 SP4 | nodejs18 | 18.20.8-150400.9.39.1 | SUSE-SU-2026:4261-1 |
| SLES 12 SP5 | nodejs18 | 18.20.8-8.44.1 | SUSE-SU-2026:4248-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | nodejs22 | 22.23.0-160000.1.1 | SUSE-SU-2026:22368-1 |
| SLES for SAP 16.0 | nodejs24 | 24.18.0-160000.1.1 | SUSE-SU-2026:22565-1 |
| SLES for SAP 15 SP6 | nodejs20 | 20.20.2-150600.3.21.1 | SUSE-SU-2026:3929-1 |
| SLES for SAP 15 SP6 | nodejs22 | 22.23.0-150600.13.18.1 | SUSE-SU-2026:2647-1 |
| SLES for SAP 15 SP5 | nodejs18 | 18.20.8-150400.9.39.1 | SUSE-SU-2026:4261-1 |
| SLES for SAP 15 SP5 | nodejs20 | 20.20.2-150500.11.30.1 | SUSE-SU-2026:3930-1 |
| SLES for SAP 15 SP4 | nodejs16 | 16.20.2-150400.3.42.1 | SUSE-SU-2026:4355-1 |
| SLES for SAP 15 SP4 | nodejs18 | 18.20.8-150400.9.39.1 | SUSE-SU-2026:4261-1 |
| SLES 16.0 | nodejs22 | 22.23.0-160000.1.1 | SUSE-SU-2026:22368-1 |
| SLES 16.0 | nodejs24 | 24.18.0-160000.1.1 | SUSE-SU-2026:22565-1 |
| SLE HPC 15 SP5 | nodejs18 | 18.20.8-150400.9.39.1 | SUSE-SU-2026:4261-1 |
| SLE HPC 15 SP5 | nodejs20 | 20.20.2-150500.11.30.1 | SUSE-SU-2026:3930-1 |
| SLE HPC 15 SP4 | nodejs16 | 16.20.2-150400.3.42.1 | SUSE-SU-2026:4355-1 |
| SLE HPC 15 SP4 | nodejs18 | 18.20.8-150400.9.39.1 | SUSE-SU-2026:4261-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | nodejs24 | 24.17.0-1.1 | openSUSE-SU-2026:11121-1 |
| openSUSE Leap 16.0 | nodejs22 | 22.23.0-160000.1.1 | openSUSE-SU-2026:21058-1 |
| openSUSE Leap 16.0 | nodejs24 | 24.18.0-160000.1.1 | openSUSE-SU-2026:21236-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | nodejs22 +4 | 1:22.23.1-1.amzn2023.0.1 | ALAS2023-2026-1921 |
| Amazon Linux 2023 | nodejs22-npm | 1:10.9.8-1.22.23.1.1.amzn2023.0.1 | ALAS2023-2026-1921 |
| Amazon Linux 2023 | nodejs24 +4 | 1:24.18.0-1.amzn2023.0.1 | ALAS2023-2026-1920 |
| Amazon Linux 2023 | nodejs24-npm | 1:11.16.0-1.24.18.0.1.amzn2023.0.1 | ALAS2023-2026-1920 |
| Amazon Linux 2023 | v8-12.4-devel | 3:12.4.254.21-1.22.23.1.1.amzn2023.0.1 | ALAS2023-2026-1921 |
| Amazon Linux 2023 | v8-13.6-devel | 3:13.6.233.17-1.24.18.0.1.amzn2023.0.1 | ALAS2023-2026-1920 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | nodejs +4 | 1:22.23.1-2.el10_2 | ELSA-2026-35842 |
| Oracle Linux 10 | nodejs-npm | 1:10.9.8-1.22.23.1.2.el10_2 | ELSA-2026-35842 |
| Oracle Linux 10 | nodejs24 +4 | 1:24.18.0-1.0.1.el10_2 | ELSA-2026-35841 |
| Oracle Linux 10 | nodejs24-npm | 1:11.16.0-1.24.18.0.1.0.1.el10_2 | ELSA-2026-35841 |
| Oracle Linux 9 | nodejs +4 | 1:22.23.1-1.module+el9.8.0+90947+d3e8e647 | ELSA-2026-35892, ELSA-2026-35891 |
| Oracle Linux 9 | nodejs-nodemon | 3.0.1-1.module+el9.8.0+90947+d3e8e647 | ELSA-2026-35892, ELSA-2026-35891 |
| Oracle Linux 9 | nodejs-packaging +1 | 2021.06-6.module+el9.8.0+90946+13dc792a | ELSA-2026-35892, ELSA-2026-35891 |
| Oracle Linux 9 | npm | 1:10.9.8-1.22.23.1.1.module+el9.8.0+90947+d3e8e647 | ELSA-2026-35892, ELSA-2026-35891 |
| Oracle Linux 9 | v8-12.4-devel | 3:12.4.254.21-1.22.23.1.1.module+el9.8.0+90947+d3e8e647 | ELSA-2026-35892 |
| Oracle Linux 9 | v8-13.6-devel | 3:13.6.233.17-1.24.18.0.1.module+el9.8.0+90946+13dc792a | ELSA-2026-35891 |
| Oracle Linux 8 | nodejs +4 | 1:22.23.1-1.module+el8.10.0+90968+e271b286 | ELSA-2026-41947, ELSA-2026-39868 |
| Oracle Linux 8 | nodejs-nodemon | 3.0.1-1.module+el8.10.0+90968+e271b286 | ELSA-2026-41947, ELSA-2026-39868 |
| Oracle Linux 8 | nodejs-packaging +1 | 2021.06-4.module+el8.10.0+90968+e271b286 | ELSA-2026-41947, ELSA-2026-39868 |
| Oracle Linux 8 | npm | 1:10.9.8-1.22.23.1.1.module+el8.10.0+90968+e271b286 | ELSA-2026-41947, ELSA-2026-39868 |
| Oracle Linux 8 | v8-12.4-devel | 3:12.4.254.21-1.22.23.1.1.module+el8.10.0+90968+e271b286 | ELSA-2026-41947 |
| Oracle Linux 8 | v8-13.6-devel | 3:13.6.233.17-1.24.18.0.1.module+el8.10.0+90961+a86f8457 | ELSA-2026-39868 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | code-server | 4.125.0-r2 | — |
| Wolfi rolling | node-gyp | 13.0.0-r1 | — |
| Wolfi rolling | npm | 11.17.0-r1 | — |
| Wolfi rolling | prism | 5.15.11-r3 | — |
| Wolfi rolling | renovate | 43.247.0-r0 | — |
| Wolfi rolling | saf | 1.6.0-r2 | — |
| Wolfi rolling | vitess-24 | 24.0.2-r1 | — |
| Wolfi rolling | vitess-24-compat | 24.0.3-r7 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | undici | < 6.27.0 | 6.27.0 | GHSA-35p6-xmwp-9g52 |
| npm | undici | >= 7.0.0, < 7.28.0 | 7.28.0 | GHSA-35p6-xmwp-9g52 |
| npm | undici | >= 8.0.0, < 8.5.0 | 8.5.0 | GHSA-35p6-xmwp-9g52 |
Advisories 43
- ALSA-2026:35892 Important: nodejs:22 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:35842 Important: nodejs22 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:35891 Important: nodejs:24 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:35841 Important: nodejs24 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:39868 Important: nodejs:24 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:41947 Important: nodejs:22 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- WID-SEC-2026-2919 IBM App Connect Enterprise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 27, 2026
- RHSA-2026:41947 Red Hat Security Advisory: nodejs:22 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:39868 Red Hat Security Advisory: nodejs:24 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:38236 Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:38009 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:35891 Red Hat Security Advisory: nodejs:24 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:35892 Red Hat Security Advisory: nodejs:22 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:35842 Red Hat Security Advisory: nodejs22 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- RHSA-2026:35841 Red Hat Security Advisory: nodejs24 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 2026
- WID-SEC-2026-2618 IBM App Connect Enterprise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 4, 2026
- SUSE-SU-2026:4355-1 Security update for nodejs16 SUSE / openSUSE Security Updates · Sep 29, 2026
- SUSE-SU-2026:4261-1 Security update for nodejs18 SUSE / openSUSE Security Updates · Sep 18, 2026
- SUSE-SU-2026:4248-1 Security update for nodejs18 SUSE / openSUSE Security Updates · Sep 18, 2026
- SUSE-SU-2026:3929-1 Security update for nodejs20 SUSE / openSUSE Security Updates · Sep 10, 2026
- SUSE-SU-2026:3930-1 Security update for nodejs20 SUSE / openSUSE Security Updates · Sep 10, 2026
- ALAS2023-2026-1920 Important: nodejs24 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jul 24, 2026
- ELSA-2026-41947 Important: nodejs:22 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 21, 2026
- RLSA-2026:41947 Important: nodejs:22 security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 20, 2026
- ELSA-2026-39868 Important: nodejs:24 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 20, 2026
- RLSA-2026:39868 Important: nodejs:24 security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 16, 2026
- ELSA-2026-35842 Important: nodejs22 security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- ELSA-2026-35841 Important: nodejs24 security, bug fix, and enhancement update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 16, 2026
- SUSE-SU-2026:22565-1 Security update for nodejs24 SUSE / openSUSE Security Updates · Jul 15, 2026
- RLSA-2026:35841 Important: nodejs24 security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 10, 2026
- openSUSE-SU-2026:21236-1 Security update for nodejs24 SUSE / openSUSE Security Updates · Jul 9, 2026
- RLSA-2026:35842 Important: nodejs22 security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 8, 2026
- ELSA-2026-35892 Important: nodejs:22 security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 8, 2026
- ALAS2023-2026-1921 Important: nodejs22 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jul 7, 2026
- RLSA-2026:35891 Important: nodejs:24 security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 7, 2026
- RLSA-2026:35892 Important: nodejs:22 security, bug fix, and enhancement update Rocky Linux Security Advisories · Jul 7, 2026
- ELSA-2026-35891 Important: nodejs:24 security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 7, 2026
- SUSE-SU-2026:22368-1 Security update for nodejs22 SUSE / openSUSE Security Updates · Jul 2, 2026
- SUSE-SU-2026:2695-1 Security update for nodejs22 SUSE / openSUSE Security Updates · Jul 1, 2026
- openSUSE-SU-2026:21058-1 Security update for nodejs22 SUSE / openSUSE Security Updates · Jun 30, 2026
- SUSE-SU-2026:2647-1 Security update for nodejs22 SUSE / openSUSE Security Updates · Jun 27, 2026
- openSUSE-SU-2026:11121-1 corepack24-24.17.0-1.1 on GA media SUSE / openSUSE Security Updates · Jun 26, 2026
- SUSE-SU-2026:2633-1 Security update for nodejs24 SUSE / openSUSE Security Updates · Jun 26, 2026