Description
Undici is an HTTP/1.1 client for Node.js. Prior to version 5.19.1, the `Headers.set()` and `Headers.append()` methods are vulnerable to Regular Expression Denial of Service (ReDoS) attacks when untrusted values are passed into the functions. This is due to the inefficient regular expression used to normalize the values in the `headerValueNormalize()` utility function. This vulnerability was patched in v5.19.1. No known workarounds are available.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| nodejs | undici | < 5.19.1 | — |
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 | 5.19.1+dfsg1+~cs20.10.9.5-1 | — |
| Debian 13 | node-undici | 5.19.1+dfsg1+~cs20.10.9.5-1 | — |
| Debian 12 | node-undici | 5.15.0+dfsg1+~cs20.10.9.3-1+deb12u1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | nodejs +3 | 1:16.19.1-1.el9_2 | RHSA-2023:2655, RHSA-2023:2654 |
| RHEL 9 | nodejs-devel | 1:18.14.2-2.module+el9.2.0.z+18497+a402347c | RHSA-2023:2654 |
| RHEL 9 | nodejs-nodemon | 2.0.20-2.module+el9.2.0.z+18497+a402347c | RHSA-2023:2655, RHSA-2023:2654 |
| RHEL 9 | nodejs-packaging +1 | 2021.06-4.module+el9.1.0+15718+e52ec601 | RHSA-2023:2654 |
| RHEL 9 | npm | 1:8.19.3-1.16.19.1.1.el9_2 | RHSA-2023:2655, RHSA-2023:2654 |
| RHEL 8 | nodejs +3 | 1:16.19.1-1.module+el8.7.0+18373+704f5cef | RHSA-2023:1583, RHSA-2023:1582 |
| RHEL 8 | nodejs-nodemon | 2.0.20-2.module+el8.7.0+18445+9493b6ea | RHSA-2023:1583, RHSA-2023:1582 |
| RHEL 8 | nodejs-packaging | 25-1.module+el8.5.0+10992+fac5fe06 | RHSA-2023:1583, RHSA-2023:1582 |
| RHEL 8 | nodejs-packaging-bundler | 2021.06-4.module+el8.7.0+15582+19c314fa | RHSA-2023:1583 |
| RHEL 8 | npm | 1:8.19.3-1.16.19.1.1.module+el8.7.0+18373+704f5cef | RHSA-2023:1583, RHSA-2023:1582 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.0 EUS | nodejs +3 | 1:16.20.2-1.el9_0 | RHSA-2023:5533 |
| RHEL 9.0 EUS | npm | 1:8.19.4-1.16.20.2.1.el9_0 | RHSA-2023:5533 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | nodejs +3 | 1:16.19.1-1.el9_2 | ALSA-2023:2655, ALSA-2023:2654 |
| AlmaLinux 9 | nodejs-devel | 1:18.14.2-2.module_el9.2.0+29+de583a0b | ALSA-2023:2654 |
| AlmaLinux 9 | nodejs-nodemon | 2.0.20-2.module_el9.2.0+29+de583a0b | ALSA-2023:2654 |
| AlmaLinux 9 | nodejs-packaging +1 | 2021.06-4.module_el9.1.0+13+d9a595ea | ALSA-2023:2654 |
| AlmaLinux 9 | npm | 1:8.19.3-1.16.19.1.1.el9_2 | ALSA-2023:2655, ALSA-2023:2654 |
| AlmaLinux 8 | nodejs +3 | 1:16.19.1-1.module_el8.7.0+3496+a59a3324 | ALSA-2023:1583, ALSA-2023:1582 |
| AlmaLinux 8 | nodejs-nodemon | 2.0.20-2.module_el8.7.0+3497+c65299e7 | ALSA-2023:1583, ALSA-2023:1582 |
| AlmaLinux 8 | nodejs-packaging | 25-1.module_el8.5.0+2605+45d748af | ALSA-2023:1583, ALSA-2023:1582 |
| AlmaLinux 8 | nodejs-packaging-bundler | 2021.06-4.module_el8.7.0+3343+ea2b7901 | ALSA-2023:1583 |
| AlmaLinux 8 | npm | 1:8.19.3-1.16.19.1.1.module_el8.7.0+3496+a59a3324 | ALSA-2023:1583, ALSA-2023:1582 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | nodejs | 1:16.19.1-1.el9_2 | RLSA-2023:2655 |
| Rocky Linux 9 | nodejs-nodemon | 2.0.20-3.el9_2 | RLSA-2023:2655 |
| Rocky Linux 9 | nodejs-packaging | 2021.06-4.module+el9.7.0+40017+f0db1785 | RLSA-2023:2654 |
| Rocky Linux 8 | nodejs | 1:16.19.1-1.module+el8.7.0+1178+d52dba78 | RLSA-2023:1583, RLSA-2023:1582 |
| Rocky Linux 8 | nodejs-nodemon | 2.0.20-2.module+el8.7.0+1108+49363b0d | RLSA-2023:1583, RLSA-2023:1582 |
| Rocky Linux 8 | nodejs-packaging | 25-1.module+el8.6.0+1046+80feca58 | RLSA-2023:1583, RLSA-2023:1582 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | nodejs16 | 16.19.1-150400.3.15.1 | SUSE-SU-2023:0608-1 |
| SLES 15 SP4 | nodejs18 | 18.14.2-150400.9.6.2 | SUSE-SU-2023:0738-1 |
| SLES 15 SP3 | nodejs16 | 16.19.1-150300.7.18.1 | SUSE-SU-2023:0673-1 |
| SLES 12 | nodejs16 | 16.19.1-8.24.1 | SUSE-SU-2023:0609-1 |
| SLES 12 | nodejs18 | 18.14.2-8.6.2 | SUSE-SU-2023:0715-1 |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP3 | nodejs16 | 16.19.1-150300.7.18.1 | SUSE-SU-2023:0673-1 |
| SLE HPC 15 SP3 | nodejs16 | 16.19.1-150300.7.18.1 | SUSE-SU-2023:0673-1 |
| SUSE Manager Server 4.2 | nodejs16 | 16.19.1-150300.7.18.1 | SUSE-SU-2023:0673-1 |
| SUSE Enterprise Storage 7.1 | nodejs16 | 16.19.1-150300.7.18.1 | SUSE-SU-2023:0673-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | nodejs18 | 18.14.2-1.1 | openSUSE-SU-2024:12725-1 |
| openSUSE Tumbleweed | nodejs19 | 19.7.0-1.1 | openSUSE-SU-2024:12726-1 |
| openSUSE Leap 15.4 | nodejs16 | 16.19.1-150400.3.15.1 | SUSE-SU-2023:0608-1 |
| openSUSE Leap 15.4 | nodejs18 | 18.14.2-150400.9.6.2 | SUSE-SU-2023:0738-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | nodejs | 18.14.1-r0 | — |
| Alpine v3.23 | nodejs | 18.14.1-r0 | — |
| Alpine v3.22 | nodejs | 18.14.1-r0 | — |
| Alpine v3.21 | nodejs | 18.14.1-r0 | — |
| Alpine v3.20 | nodejs | 18.14.1-r0 | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | nodejs | 18.14.1-r0 | — |
| Alpine v3.18 | nodejs | 18.14.1-r0 | — |
| Alpine v3.17 | nodejs | 18.14.1-r0 | — |
| Alpine v3.16 | nodejs | 16.19.1-r0 | — |
| Alpine v3.15 | nodejs | 16.19.1-r0 | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | nodejs | 16.19.1-1 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | nodejs +3 | 1:16.19.1-1.el9_2 | ELSA-2023-2655, ELSA-2023-2654 |
| Oracle Linux 9 | nodejs-devel | 1:18.14.2-2.module+el9.2.0+21038+115df6a2 | ELSA-2023-2654 |
| Oracle Linux 9 | nodejs-nodemon | 2.0.20-2.module+el9.2.0+21038+115df6a2 | ELSA-2023-2655, ELSA-2023-2654 |
| Oracle Linux 9 | nodejs-packaging +1 | 2021.06-4.module+el9.1.0+20762+f52d7401 | ELSA-2023-2654 |
| Oracle Linux 9 | npm | 1:8.19.3-1.16.19.1.1.el9_2 | ELSA-2023-2655, ELSA-2023-2654 |
| Oracle Linux 8 | nodejs +3 | 1:16.19.1-1.module+el8.7.0+21021+1eb7f63d | ELSA-2023-1583, ELSA-2023-1582 |
| Oracle Linux 8 | nodejs-nodemon | 2.0.20-2.module+el8.7.0+21020+b7aeeb08 | ELSA-2023-1583, ELSA-2023-1582 |
| Oracle Linux 8 | nodejs-packaging | 25-1.module+el8.5.0+20388+4b61e68d | ELSA-2023-1583, ELSA-2023-1582 |
| Oracle Linux 8 | nodejs-packaging-bundler | 2021.06-4.module+el8.7.0+20766+0a247725 | ELSA-2023-1583 |
| Oracle Linux 8 | npm | 1:8.19.3-1.16.19.1.1.module+el8.7.0+21021+1eb7f63d | ELSA-2023-1583, ELSA-2023-1582 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | undici | < 5.19.1 | 5.19.1 | GHSA-r6ch-mqf9-qc9w |
Advisories 27
- ALSA-2023:2654 Moderate: nodejs:18 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:2655 Moderate: nodejs and nodejs-nodemon security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:1583 Moderate: nodejs:18 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2023:1582 Moderate: nodejs:16 security, bug fix, and enhancement update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2023:2654 Red Hat Security Advisory: nodejs:18 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2023:2655 Red Hat Security Advisory: nodejs and nodejs-nodemon security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2023:1583 Red Hat Security Advisory: nodejs:18 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2023:1582 Red Hat Security Advisory: nodejs:16 security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2023:5533 Red Hat Security Advisory: nodejs security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 9, 2026
- RLSA-2023:1582 Moderate: nodejs:16 security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2023:1583 Moderate: nodejs:18 security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- RLSA-2023:2655 Moderate: nodejs and nodejs-nodemon security, bug fix, and enhancement update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:12726-1 corepack19-19.7.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0609-1 Security update for nodejs16 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0738-1 Security update for nodejs18 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0715-1 Security update for nodejs18 SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:12725-1 corepack18-18.14.2-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0608-1 Security update for nodejs16 SUSE / openSUSE Security Updates · Feb 4, 2026
- FSA-202302 Festo: Several vulnerabilities in FactoryViews CERT@VDE · Feb 2, 2026
- RLSA-2023:2654 Moderate: nodejs:18 security, bug fix, and enhancement update Rocky Linux Security Advisories · Dec 3, 2025
- WID-SEC-2023-0414 Node.js: Mehrere Schwachstellen BSI CERT-Bund (WID) · Dec 2, 2025
- WID-SEC-2023-1424 Xerox FreeFlow Print Server für Solaris: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 6, 2025
- SUSE-SU-2023:0673-1 Security update for nodejs16 SUSE / openSUSE Security Updates · May 2, 2025
- ELSA-2023-2655 Moderate: nodejs and nodejs-nodemon security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 17, 2023
- ELSA-2023-2654 Moderate: nodejs:18 security, bug fix, and enhancement update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 17, 2023
- ELSA-2023-1582 Moderate: nodejs:16 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 5, 2023
- ELSA-2023-1583 Moderate: nodejs:18 security, bug fix, and enhancement update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 5, 2023