CVE-2026-38347

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-28. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: None knownExposed: 0

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

A heap overflow in the ff_sws_alphablendaway function (libswscale/alphablend.c) of FFmpeg git-master commit 722a217 allows attackers to cause a Denial of Service (DoS) via a crafted input.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
26%
KEV
Not listed

Published

August 27, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Aug 31, 2026
No patch confirmed yet.
generic

#11692 ([Security] heap-buffer-overflow on alphablend.c:77) – FFmpeg

https://trac.ffmpeg.org/ticket/11692

Vendor Advisories for CVE-2026-38347(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:5.1.3-1 ... 7:9.0.1-1 (59 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:7.1.4-0+deb13u1 (6 versions)7:7.1.5-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:8.0.1-1 (6 versions)7:8.0.1-2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 26× in last 7d / 92× 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. 2026-09-20 21:16 UTCEG score recompute
  2. 2026-09-20 21:16 UTCGHSA enrichment
  3. 2026-09-20 20:15 UTCEPSS rescore
  4. 2026-09-20 09:31 UTCGHSA enrichment
  5. 2026-09-19 21:46 UTCEG score recompute
  6. 2026-09-19 21:46 UTCGHSA enrichment
  7. 2026-09-19 10:02 UTCGHSA enrichment
  8. 2026-09-18 21:30 UTCEG score recompute
  9. 2026-09-18 21:30 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 19:28 UTCEPSS rescore
  12. 2026-09-18 08:41 UTCGHSA enrichment
  13. 2026-09-17 20:56 UTCEG score recompute
  14. 2026-09-17 20:56 UTCGHSA enrichment
  15. 2026-09-17 19:30 UTCEPSS rescore
  16. 2026-09-17 06:51 UTCGHSA enrichment
  17. 2026-09-16 19:05 UTCEG score recompute
  18. 2026-09-16 19:05 UTCGHSA enrichment
  19. 2026-09-16 14:08 UTCEPSS rescore
  20. 2026-09-16 05:15 UTCEPSS rescore
  21. 2026-09-16 05:07 UTCGHSA enrichment
  22. 2026-09-15 17:22 UTCGHSA enrichment
  23. 2026-09-15 05:37 UTCEG score recompute
  24. 2026-09-15 05:37 UTCGHSA enrichment
  25. 2026-09-15 03:11 UTCEPSS rescore
Show 67 more
  1. 2026-09-14 17:04 UTCGHSA enrichment
  2. 2026-09-14 05:19 UTCGHSA enrichment
  3. 2026-09-13 17:35 UTCEG score recompute
  4. 2026-09-13 17:35 UTCGHSA enrichment
  5. 2026-09-13 16:47 UTCEPSS rescore
  6. 2026-09-13 05:50 UTCGHSA enrichment
  7. 2026-09-12 18:05 UTCEG score recompute
  8. 2026-09-12 18:05 UTCGHSA enrichment
  9. 2026-09-12 15:01 UTCEPSS rescore
  10. 2026-09-12 06:18 UTCGHSA enrichment
  11. 2026-09-11 18:34 UTCEG score recompute
  12. 2026-09-11 18:34 UTCGHSA enrichment
  13. 2026-09-11 14:53 UTCEPSS rescore
  14. 2026-09-11 09:37 UTCEPSS rescore
  15. 2026-09-11 06:49 UTCGHSA enrichment
  16. 2026-09-10 19:04 UTCEG score recompute
  17. 2026-09-10 19:03 UTCGHSA enrichment
  18. 2026-09-10 09:34 UTCEPSS rescore
  19. 2026-09-10 07:18 UTCGHSA enrichment
  20. 2026-09-09 19:34 UTCGHSA enrichment
  21. 2026-09-09 07:49 UTCEG score recompute
  22. 2026-09-09 07:49 UTCGHSA enrichment
  23. 2026-09-08 22:00 UTCEPSS rescore
  24. 2026-09-08 20:05 UTCGHSA enrichment
  25. 2026-09-08 05:57 UTCGHSA enrichment
  26. 2026-09-07 18:09 UTCEG score recompute
  27. 2026-09-07 18:09 UTCGHSA enrichment
  28. 2026-09-07 16:01 UTCEPSS rescore
  29. 2026-09-07 06:24 UTCGHSA enrichment
  30. 2026-09-06 18:36 UTCEG score recompute
  31. 2026-09-06 18:36 UTCGHSA enrichment
  32. 2026-09-06 13:47 UTCEPSS rescore
  33. 2026-09-06 06:51 UTCGHSA enrichment
  34. 2026-09-05 19:06 UTCEG score recompute
  35. 2026-09-05 19:06 UTCGHSA enrichment
  36. 2026-09-05 07:22 UTCGHSA enrichment
  37. 2026-09-04 19:37 UTCEG score recompute
  38. 2026-09-04 19:37 UTCGHSA enrichment
  39. 2026-09-04 07:51 UTCEG score recompute
  40. 2026-09-04 07:51 UTCGHSA enrichment
  41. 2026-09-04 05:06 UTCEPSS rescore
  42. 2026-09-03 20:07 UTCGHSA enrichment
  43. 2026-09-03 08:18 UTCGHSA enrichment
  44. 2026-09-02 20:32 UTCEG score recompute
  45. 2026-09-02 20:32 UTCGHSA enrichment
  46. 2026-09-02 14:12 UTCEPSS rescore
  47. 2026-09-02 05:56 UTCGHSA enrichment
  48. 2026-09-01 18:06 UTCEG score recompute
  49. 2026-09-01 18:06 UTCGHSA enrichment
  50. 2026-09-01 13:53 UTCEPSS rescore
  51. 2026-09-01 06:21 UTCEG score recompute
  52. 2026-09-01 06:21 UTCGHSA enrichment
  53. 2026-09-01 04:39 UTCEPSS rescore
  54. 2026-08-31 18:35 UTCEG score recompute
  55. 2026-08-31 18:34 UTCGHSA enrichment
  56. 2026-08-31 17:46 UTCEG score recompute▲ 7.50
  57. 2026-08-31 17:46 UTCGHSA enrichment
  58. 2026-08-31 17:44 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  59. 2026-08-31 01:39 UTCEG score recompute
  60. 2026-08-31 01:39 UTCGHSA enrichment
  61. 2026-08-30 19:17 UTCEPSS rescore
  62. 2026-08-30 01:22 UTCEPSS rescore
  63. 2026-08-28 21:41 UTCEPSS rescore
  64. 2026-08-28 00:32 UTCGHSA enrichment
  65. 2026-08-28 00:26 UTCNVD update
  66. 2026-08-27 23:24 UTCEG score recompute
  67. 2026-08-27 23:22 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-38347?
CVE-2026-38347 is a high vulnerability published on August 27, 2026. A heap overflow in the ffswsalphablendaway function (libswscale/alphablend.c) of FFmpeg git-master commit 722a217 allows attackers to cause a Denial of Service (DoS) via a crafted input.
When was CVE-2026-38347 disclosed?
CVE-2026-38347 was first published in the National Vulnerability Database on August 27, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-38347 actively exploited?
CVE-2026-38347 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 73.8% of all scored CVEs.
What is the CVSS score of CVE-2026-38347?
CVE-2026-38347 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-38347?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-38347, 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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