major vulnerability· requires attention

FFmpeg is a widely used multimedia library across many apps and services; this bug can crash or enable code execution when processing crafted media.

Applications

CVE-2026-125267

8.5

High

EPSS 0.14%Patch available

Heap out-of-bounds write in FFmpeg APAC decoder allowing crash or possible code execution

exploited

No known exploitation not in CISA KEV as of our last sync

fix

Patch available see the advisory in the references

likelihood

EPSS 0.14%top 97% of scored CVEs

Published 9 Nov 2026Analysed here 11 Nov 2026CVSS scored by the publisher (CNA)

common questions

Is CVE-2026-125267 being exploited?

Not confirmed. CVE-2026-125267 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.14% probability of exploitation in the next 30 days.

How severe is CVE-2026-125267?

CVE-2026-125267 is rated High with a CVSS score of 8.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-125267?

Yes. A fix has been recorded for CVE-2026-125267. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-125267 affect?

CVE-2026-125267 affects FFmpeg < 8.1.3, FFmpeg 9.0.0-9.0.1, Any application using FFmpeg's libavcodec APAC decoder. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-125267?

Upgrade FFmpeg to >=8.1.3 or >=9.0.2; avoid processing untrusted APAC media.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

FFmpeg < 8.1.3FFmpeg 9.0.0-9.0.1Any application using FFmpeg's libavcodec APAC decoder

impact

Crafted APAC file triggers integer overflow and heap OOB write via memcpy; can crash processes or enable remote code execution via heap corruption.

action required

Patch when possible

affected versions

FFmpeg

affected< 8.1.3
affected>= 9.0 and < 9.0.2

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

cisa ssvc

exploitation: none
automatable: no
technical impact: total

Assessed by CISA 10 Nov 2026 (SSVC 2.0.3).

timeline

9 Nov 2026Published
10 Nov 2026CISA SSVC assessment: exploitation none · 1 day later
10 Nov 2026CVE record last updated · same day later
11 Nov 2026Analysed by vulneraibility.com · 1 day later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

5 references in the CVE record: 1 advisory, 1 patch, 3 links

Advisoryvulncheck.com /advisories/ffmpeg-before-8.1.3-and-9-x-before-9.0.2-heap-out-of-bounds-write-vi
Patchgithub.com /FFmpeg/FFmpeg/commit/e15ddb7f9a2f9b3ab8ac305efb6f94ddc18463d0
Linkcode.ffmpeg.org /FFmpeg/FFmpeg/pulls/24432
Linkgithub.com /FFmpeg/FFmpeg/blob/n9.0.1/libavcodec/apac.c#L146
Linkgithub.com /FFmpeg/FFmpeg

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
CISA Vulnrichment (ADP): SSVC decision points
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

get alerted

Track only the vulnerabilities that affect your infrastructure.

start for free