9router: Unauthenticated LLM proxy access via /codex rewrite authorization bypass

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-55638 · Microsoft / collected KEV context

EUVD-2026-42931

GHSA-8gmq-j984-vp4r

cve-program · CVE-2026-55638

• https://github.com/decolua/9router/security/advisories/GHSA-8gmq-j984-vp4r
• https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3
• https://github.com/decolua/9router/releases/tag/v0.5.2

euvd · EUVD-2026-42931

• https://github.com/decolua/9router/security/advisories/GHSA-8gmq-j984-vp4r
• https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3
• https://github.com/decolua/9router/releases/tag/v0.5.2

nvd · CVE-2026-55638

• https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3
• https://github.com/decolua/9router/releases/tag/v0.5.2
• https://github.com/decolua/9router/security/advisories/GHSA-8gmq-j984-vp4r

osv · GHSA-8gmq-j984-vp4r

• https://github.com/decolua/9router/security/advisories/GHSA-8gmq-j984-vp4r
• https://nvd.nist.gov/vuln/detail/CVE-2026-55638
• https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3
• https://github.com/decolua/9router
• https://github.com/decolua/9router/releases/tag/v0.5.2

No related operational record is retained in the current change model.