Mercure has a Topic Selector Cache Key Collision

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

CVE-2026-39972 · Microsoft / collected KEV context

EUVD-2026-20967

GHSA-hwr4-mq23-wcv5

GO-2026-5444

cve-program · CVE-2026-39972

• https://github.com/dunglas/mercure/security/advisories/GHSA-hwr4-mq23-wcv5
• https://github.com/dunglas/mercure/commit/4964a69be904fd61e35b5f1e691271663b6fdd64

euvd · EUVD-2026-20967

• https://github.com/dunglas/mercure/security/advisories/GHSA-hwr4-mq23-wcv5
• https://github.com/dunglas/mercure/commit/4964a69be904fd61e35b5f1e691271663b6fdd64

nvd · CVE-2026-39972

• https://github.com/dunglas/mercure/commit/4964a69be904fd61e35b5f1e691271663b6fdd64
• https://github.com/dunglas/mercure/security/advisories/GHSA-hwr4-mq23-wcv5

osv · GHSA-hwr4-mq23-wcv5

• https://github.com/dunglas/mercure/security/advisories/GHSA-hwr4-mq23-wcv5
• https://nvd.nist.gov/vuln/detail/CVE-2026-39972
• https://github.com/dunglas/mercure/commit/4964a69be904fd61e35b5f1e691271663b6fdd64
• https://github.com/dunglas/mercure
• https://github.com/dunglas/mercure/releases/tag/v0.22.0

osv · GO-2026-5444

• https://github.com/dunglas/mercure/security/advisories/GHSA-hwr4-mq23-wcv5
• https://nvd.nist.gov/vuln/detail/CVE-2026-39972
• https://github.com/dunglas/mercure/commit/4964a69be904fd61e35b5f1e691271663b6fdd64
• https://github.com/dunglas/mercure/releases/tag/v0.22.0

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