Description
Impact:
Undici's cache interceptor incorrectly classifies some responses as cacheable when the upstream Cache-Control header uses whitespace-padded qualified private or no-cache field names such as private=" authorization" or no-cache="\tauthorization". The parser preserves the surrounding whitespace, so later comparisons against the literal authorization field name fail and the response is stored.
In shared-cache mode, this allows a response containing one user's authenticated data to be served from cache to a subsequent caller, including an unauthenticated caller, when both requests resolve to the same cache key.
Affected applications are those that explicitly enable the cache interceptor (interceptors.cache()) in shared mode, forward Authorization headers upstream, and receive cacheable responses with non-canonical qualified private or no-cache directives.
Patches:
Upgrade to undici v7.28.0 or v8.5.0.
Workarounds:
If upgrade is not immediately possible, disable shared-cache mode for traffic that includes Authorization headers, avoid caching responses to authenticated requests, or add Vary: Authorization upstream.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| undici | undici | 7.0.0 – < 7.28.0, 8.0.0 – < 8.5.0 | 7.28.0 |
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 | — |
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 | nodejs25 +6 | 25.9.0-1.1.hum1 | RHSA-2026:7378 |
| Red Hat Hardened Images 1 | nodejs25-npm | 11.12.1-1.25.9.0.1.1.hum1 | RHSA-2026:7378 |
| Red Hat Hardened Images 1 | nodejs26 +6 | 26.3.0-1.2.hum1 | RHSA-2026:22380 |
| Red Hat Hardened Images 1 | nodejs26-npm | 11.16.0-1.26.3.0.1.2.hum1 | RHSA-2026:22380 |
| 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 | nodejs24 | 24.17.0-150700.15.11.1 | SUSE-SU-2026:2633-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | nodejs24 | 24.18.0-160000.1.1 | SUSE-SU-2026:22565-1 |
| SLES 16.0 | nodejs24 | 24.18.0-160000.1.1 | SUSE-SU-2026:22565-1 |
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 | nodejs24 | 24.18.0-160000.1.1 | openSUSE-SU-2026:21236-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| 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 | v8-13.6-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 | langfuse-3 +1 | 3.194.0-r0 | — |
| Wolfi rolling | langfuse-3-compat | 3.225.7-r6 | — |
| Wolfi rolling | renovate | 43.247.0-r0 | — |
| 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 | >= 7.0.0, < 7.28.0 | 7.28.0 | GHSA-pr7r-676h-xcf6 |
| npm | undici | >= 8.0.0, < 8.5.0 | 8.5.0 | GHSA-pr7r-676h-xcf6 |
Advisories 35
- WID-SEC-2026-3621 IBM App Connect Enterprise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 9, 2026
- 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-2026:7378 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Oct 20, 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-2026:35891 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
- RHSA-2026:22380 Red Hat Security Advisory: Red Hat Hardened Images RPMs 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
- 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
- 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-2026:2633-1 Security update for nodejs24 SUSE / openSUSE Security Updates · Jun 26, 2026
- openSUSE-SU-2026:11121-1 corepack24-24.17.0-1.1 on GA media SUSE / openSUSE Security Updates · Jun 26, 2026