Description
Undici is an HTTP/1.1 client for Node.js. Prior to 7.18.0 and 6.23.0, the number of links in the decompression chain is unbounded and the default maxHeaderSize allows a malicious server to insert thousands compression steps leading to high CPU usage and excessive memory allocation. This vulnerability is fixed in 7.18.0 and 6.23.0.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| nodejs | undici | < 6.23.0, >= 7.0.0, < 7.18.2 | — |
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 | 7.18.2+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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | nodejs22 | 22.22.0-150700.3.6.1 | SUSE-SU-2026:0301-1 |
| SLES 15 SP6 | nodejs20 | 20.20.0-150600.3.15.1 | SUSE-SU-2026:3929-1, SUSE-SU-2026:0435-1 |
| SLES 15 SP6 | nodejs22 | 22.22.0-150600.13.12.1 | SUSE-SU-2026:0295-1 |
| SLES 15 SP5 | nodejs18 | 18.20.8-150400.9.39.1 | SUSE-SU-2026:4261-1 |
| SLES 15 SP5 | nodejs20 | 20.20.0-150500.11.24.1 | SUSE-SU-2026:3930-1, SUSE-SU-2026:0457-1 |
| 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 | 22.22.0-160000.1.1 | SUSE-SU-2026:20436-1 |
| SLES for SAP 15 SP6 | nodejs20 | 20.20.0-150600.3.15.1 | SUSE-SU-2026:3929-1, SUSE-SU-2026:0435-1 |
| SLES for SAP 15 SP6 | nodejs22 | 22.22.0-150600.13.12.1 | SUSE-SU-2026:0295-1 |
| SLES for SAP 15 SP5 | nodejs18 | 18.20.8-150400.9.39.1 | SUSE-SU-2026:4261-1 |
| SLES for SAP 15 SP5 | nodejs20 | 20.20.0-150500.11.24.1 | SUSE-SU-2026:3930-1, SUSE-SU-2026:0457-1 |
| 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 | 22.22.0-160000.1.1 | SUSE-SU-2026:20436-1 |
| SLE HPC 15 SP5 | nodejs18 | 18.20.8-150400.9.39.1 | SUSE-SU-2026:4261-1 |
| SLE HPC 15 SP5 | nodejs20 | 20.20.0-150500.11.24.1 | SUSE-SU-2026:3930-1, SUSE-SU-2026:0457-1 |
| 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 | nodejs22 | 22.22.0-1.1 | openSUSE-SU-2026:10074-1 |
| openSUSE Tumbleweed | nodejs24 | 24.13.0-2.1 | openSUSE-SU-2026:10075-1 |
| openSUSE Tumbleweed | nodejs26 | 26.3.1-1.1 | openSUSE-SU-2026:11110-1 |
| openSUSE Leap 16.0 | nodejs22 | 22.22.0-160000.1.1 | openSUSE-SU-2026:20236-1 |
| openSUSE Leap 15.6 | nodejs20 | 20.20.0-150600.3.15.1 | SUSE-SU-2026:0435-1 |
| openSUSE Leap 15.6 | nodejs22 | 22.22.0-150600.13.12.1 | SUSE-SU-2026:0295-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | nodejs24 +4 | 1:24.13.0-1.amzn2023.0.1 | ALAS2023-2026-1404 |
| Amazon Linux 2023 | nodejs24-npm | 1:11.6.2-1.24.13.0.1.amzn2023.0.1 | ALAS2023-2026-1404 |
| Amazon Linux 2023 | v8-13.6-devel | 3:13.6.233.17-1.24.13.0.1.amzn2023.0.1 | ALAS2023-2026-1404 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | code-server | 4.106.3-r2 | — |
| Wolfi rolling | jitsucom-jitsu-rotor +1 | 2.11.0-r12 | — |
| Wolfi rolling | langfuse-3-worker | 3.146.0-r2 | — |
| Wolfi rolling | renovate | 42.92.4-r0 | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | undici | >= 7.0.0, < 7.18.2 | 7.18.2 | GHSA-g9mf-h72j-4rw9 |
| npm | undici | < 6.23.0 | 6.23.0 | GHSA-g9mf-h72j-4rw9 |
Advisories 16
- 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
- openSUSE-SU-2026:11110-1 nodejs26-26.3.1-1.1 on GA media SUSE / openSUSE Security Updates · Jun 24, 2026
- VDE-2026-064 METTLER TOLEDO: LabX Standard Report on External Component Analysis - v21.3 CERT@VDE · Jun 9, 2026
- openSUSE-SU-2026:20236-1 Security update for nodejs22 SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10074-1 corepack22-22.22.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2026:10075-1 corepack24-24.13.0-2.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:20436-1 Security update for nodejs22 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0435-1 Security update for nodejs20 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0301-1 Security update for nodejs22 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0295-1 Security update for nodejs22 SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2026:0457-1 Security update for nodejs20 SUSE / openSUSE Security Updates · Mar 23, 2026
- ALAS2023-2026-1404 Important: nodejs24 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Feb 5, 2026