CVE-2026-30999
A heap buffer overflow in the av_bprint_finalize() function of FFmpeg v8.0.1 allows attackers to cause a Denial of Service (DoS) via a crafted input.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.45%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
A heap buffer overflow in the av_bprint_finalize() function of FFmpeg v8.0.1 allows attackers to cause a Denial of Service (DoS) via a crafted input.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.45% probability · 39th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-122
- Affected
- ffmpeg/ffmpeg
- Source
- cve@mitre.org
EPSS 0.5% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://excellent-oatmeal-319.notion.site/CVE-2026-30999-Memory-Leak-e0d88ac53e2e42c1b5ef9aa3497e27b6Exploit, Third Party Advisory
- https://ffmpeg.org/doxygen/7.0/zmqsend_8c_source.htmlProduct
- https://github.com/FFmpeg/FFmpeg/blob/master/tools/zmqsend.cProduct
- https://www.ffmpeg.org/download.htmlProduct
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.