CVE-2026-43969
low
CVSS v3
3.2
CVSS v4 NEW
2.1
VIR risk
3.2
Description
cowlib: Cookie Request Header Injection via Unvalidated Encoder in cow_cookie:cookie/1
Predictions
Exploit likelihood
33%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Windows Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0 |
| sid | Fixed | 0 |
| forky | Fixed | 0 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 0 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| ninenines | cowlib | {"startIncluding":"2.9.0","endIncluding":"2.16.1"} | |
References
- https://cna.erlef.org/cves/CVE-2026-43969.html
- https://github.com/erlef/cowlib/commit/177953dd51540da11090666c1f007214127a1144
- https://osv.dev/vulnerability/EEF-CVE-2026-43969
- https://security-tracker.debian.org/tracker/CVE-2026-43969
- https://hex.pm/packages/cowlib
- https://nvd.nist.gov/vuln/detail/CVE-2026-43969
- https://github.com/ninenines/cowlib
- https://github.com/advisories/GHSA-g2wm-735q-3f56
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-43969
CWEs
CWE-93
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.