CVE-2026-52295

MEDIUMPre-NVD 6.26.2—
EchelonGraph scoreHIGH confidence

Score 6.2 from GitHub Security Advisory published 2026-09-01. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 6.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.2Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

FFmpeg before 9.0 has an out-of-bounds read because the copied extradata lacked required padding before GetBitContext-based access in libavformat/iamf_writer.c.

CVSS v3
6.2
EG Score
6.2(high)
EG Risk
28(Track)
EG Risk 28/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity62% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
6%
KEV
Not listed

Published

September 1, 2026

Last Modified

September 13, 2026

Advisory Details (3)

Auto-updated Sep 7, 2026
No patch confirmed yet.
generic

Making sure you're not a bot!

https://git.ffmpeg.org/gitweb/ffmpeg.git/commit/8439e0203744a30d280668fcd086f74ed5001da1
generic

#22988 - Fix various extradata padding issues - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22988
generic

VulnerabilitiesReference/FFmpeg/ExtradataPadding at main · Kenan-Kamel/VulnerabilitiesReference · GitHub

https://github.com/Kenan-Kamel/VulnerabilitiesReference/tree/main/FFmpeg/ExtradataPadding

Vendor Advisories for CVE-2026-52295(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1, 7:7.1.2-0+deb13u1, 7:7.1.2-1, 7:7.1.3-0+deb13u1, 7:7.1.3-17:7.1.4-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:8.1-3 (11 versions)7:8.1.1-1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 15× in last 7d / 55× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-24 16:16 UTCEG score recompute
  2. 2026-09-24 16:16 UTCGHSA enrichment
  3. 2026-09-23 17:53 UTCEPSS rescore
  4. 2026-09-23 14:28 UTCEG score recompute
  5. 2026-09-23 14:28 UTCGHSA enrichment
  6. 2026-09-22 12:41 UTCEG score recompute
  7. 2026-09-22 12:41 UTCGHSA enrichment
  8. 2026-09-21 10:54 UTCEG score recompute
  9. 2026-09-21 10:54 UTCGHSA enrichment
  10. 2026-09-20 20:16 UTCEPSS rescore
  11. 2026-09-20 09:06 UTCEG score recompute
  12. 2026-09-20 09:06 UTCGHSA enrichment
  13. 2026-09-19 07:18 UTCEG score recompute
  14. 2026-09-19 07:18 UTCGHSA enrichment
  15. 2026-09-18 19:28 UTCEPSS rescore
  16. 2026-09-18 05:31 UTCEG score recompute
  17. 2026-09-18 05:31 UTCGHSA enrichment
  18. 2026-09-17 03:43 UTCEG score recompute
  19. 2026-09-17 03:43 UTCGHSA enrichment
  20. 2026-09-16 14:08 UTCEPSS rescore
  21. 2026-09-16 05:15 UTCEPSS rescore
  22. 2026-09-16 01:56 UTCEG score recompute
  23. 2026-09-16 01:56 UTCGHSA enrichment
  24. 2026-09-15 00:09 UTCGHSA enrichment
  25. 2026-09-13 22:21 UTCGHSA enrichment
Show 30 more
  1. 2026-09-13 21:59 UTCEG score recompute
  2. 2026-09-13 21:59 UTCGHSA enrichment
  3. 2026-09-13 16:47 UTCEPSS rescore
  4. 2026-09-12 21:58 UTCEG score recompute
  5. 2026-09-12 21:58 UTCGHSA enrichment
  6. 2026-09-11 20:11 UTCEG score recompute
  7. 2026-09-11 20:11 UTCGHSA enrichment
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-10 17:57 UTCEG score recompute
  10. 2026-09-10 17:57 UTCGHSA enrichment
  11. 2026-09-10 09:35 UTCEPSS rescore
  12. 2026-09-09 16:09 UTCGHSA enrichment
  13. 2026-09-09 15:01 UTCEG score recompute
  14. 2026-09-09 15:01 UTCGHSA enrichment
  15. 2026-09-08 22:01 UTCEPSS rescore
  16. 2026-09-08 13:14 UTCEG score recompute
  17. 2026-09-08 13:13 UTCGHSA enrichment
  18. 2026-09-07 16:01 UTCEPSS rescore
  19. 2026-09-07 11:23 UTCGHSA enrichment
  20. 2026-09-07 11:05 UTCEG score recompute▲ 6.20
  21. 2026-09-07 11:04 UTCGHSA enrichment
  22. 2026-09-07 11:01 UTCMITRE cvelistV5CVSS v3 → 6.2 · severity → MEDIUM
  23. 2026-09-06 13:47 UTCEPSS rescore
  24. 2026-09-04 19:27 UTCEG score recompute
  25. 2026-09-04 19:27 UTCGHSA enrichment
  26. 2026-09-04 05:06 UTCEPSS rescore
  27. 2026-09-02 14:12 UTCEPSS rescore
  28. 2026-09-01 18:22 UTCNVD update
  29. 2026-09-01 17:37 UTCEG score recompute
  30. 2026-09-01 17:37 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-52295?
CVE-2026-52295 is a medium vulnerability published on September 1, 2026. FFmpeg before 9.0 has an out-of-bounds read because the copied extradata lacked required padding before GetBitContext-based access in libavformat/iamf_writer.c.
When was CVE-2026-52295 disclosed?
CVE-2026-52295 was first published in the National Vulnerability Database on September 1, 2026, with the most recent update on September 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52295 actively exploited?
CVE-2026-52295 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 93.8% of all scored CVEs.
What is the CVSS score of CVE-2026-52295?
CVE-2026-52295 has a CVSS v3.1 base score of 6.2 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-52295?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52295, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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