Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Versions of github.com/lucasdillmann/nginx-ignition from 0.0.0-20260126024607-cbaf0fc16ed8 up to, but not including, 0.0.0-20260526022344-0c988fc1277c are affected. An unauthenticated attacker who can reach the HTTP listener can send one GET request with a crafted Accept-Language header made of underscore separators, which makes the server spend roughly 2.4 seconds of CPU per request and enables denial of service. Upgrade to 0.0.0-20260526022344-0c988fc1277c, which contains the fix.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 7.5 | High | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0042, the 36th percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:12 UTC First seen by agentprime
- 31 Oct 2026, 14:12 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-jr34-h97m-9hpx
- OSV: GHSA-jr34-h97m-9hpx
- github.com/lucasdillmann/nginx-ignition/security/advisories/GHSA-jr34-h97m-9hpx
- nvd.nist.gov/vuln/detail/CVE-2026-61629
- github.com/lucasdillmann/nginx-ignition/pull/125
- github.com/lucasdillmann/nginx-ignition/commit/0c988fc1277c7d291725e8373313f8486fa1b31a
- github.com/lucasdillmann/nginx-ignition/commit/cbaf0fc16ed873f7178a2ca9b0d00a696e44b485
- github.com/lucasdillmann/nginx-ignition
- github.com/lucasdillmann/nginx-ignition/releases/tag/2.40.1