CVE-2025-30403

CVSS 8.1 HIGHEPSS 0.3%

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.1EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

11 Jul 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

A heap-buffer-overflow vulnerability is possible in mvfst via a specially crafted message during a QUIC session. This issue affects mvfst versions prior to v2025.07.07.00.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Affected products

Facebook · mvfst

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References

https://github.com/facebook/mvfst/commit/65b297332191de6e867c4a3139a233fc84c0e7e0 https://www.facebook.com/security/advisories/cve-2025-30403