Parse Server: Stored XSS via non-standard file extension bypassing file upload extension blocklist

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

CVE-2026-55778 · Microsoft / collected KEV context

EUVD-2026-42414

GHSA-v8x7-r927-cc93

BIT-parse-2026-55778

cve-program · CVE-2026-55778

• https://github.com/parse-community/parse-server/security/advisories/GHSA-v8x7-r927-cc93
• https://github.com/parse-community/parse-server/pull/10505
• https://github.com/parse-community/parse-server/pull/10506
• https://github.com/parse-community/parse-server/commit/97c6a78d19f976ec756c1295f08a8fccab90799a
• https://github.com/parse-community/parse-server/commit/be12a60d65b6e140481882037fb896b1f951df50
• https://github.com/parse-community/parse-server/releases/tag/8.6.81
• https://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.11

euvd · EUVD-2026-42414

• https://github.com/parse-community/parse-server/security/advisories/GHSA-v8x7-r927-cc93
• https://github.com/parse-community/parse-server/pull/10505
• https://github.com/parse-community/parse-server/pull/10506
• https://github.com/parse-community/parse-server/commit/97c6a78d19f976ec756c1295f08a8fccab90799a
• https://github.com/parse-community/parse-server/commit/be12a60d65b6e140481882037fb896b1f951df50
• https://github.com/parse-community/parse-server/releases/tag/8.6.81
• https://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.11

nvd · CVE-2026-55778

• https://github.com/parse-community/parse-server/commit/97c6a78d19f976ec756c1295f08a8fccab90799a
• https://github.com/parse-community/parse-server/commit/be12a60d65b6e140481882037fb896b1f951df50
• https://github.com/parse-community/parse-server/pull/10505
• https://github.com/parse-community/parse-server/pull/10506
• https://github.com/parse-community/parse-server/releases/tag/8.6.81
• https://github.com/parse-community/parse-server/releases/tag/9.9.1-alpha.11
• https://github.com/parse-community/parse-server/security/advisories/GHSA-v8x7-r927-cc93

osv · GHSA-v8x7-r927-cc93

• https://github.com/parse-community/parse-server/security/advisories/GHSA-v8x7-r927-cc93
• https://github.com/parse-community/parse-server/pull/10505
• https://github.com/parse-community/parse-server/pull/10506
• https://github.com/parse-community/parse-server

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