CVE-2026-38347

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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 (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
38th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 27, 2026

Last Modified

September 8, 2026

Advisory Details (1)

Auto-updated Aug 31, 2026
Patch available.
Web page

#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.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibswscale-ffmpeg3 (7:2.8.17-0ubuntu0.1+esm18) @ xenial2026-10-17ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ffmpeg7:5.1.3-1 ... 7:9.0.2-1 (60 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ffmpeg7:7.1.1-1 ... 7:7.1.4-0+deb13u1 (6 versions)
  • every version up to 7:7.1.5-0+deb13u1: fixed in 7:7.1.5-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ffmpeg7:7.1.1-1 ... 7:8.0.1-1 (6 versions)
  • every version up to 7:8.0.1-2: fixed in 7:8.0.1-2
—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 11× in last 7d / 87× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 99 of 175 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 1 repeat row among the latest 100 is merged into the row it repeats. The 76 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  2. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  3. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  4. 2026-10-18 03:44 UTCEG score recompute
  5. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  6. 2026-10-17 15:09 UTCEG score recompute
  7. 2026-10-17 15:09 UTCVendor advisory
  8. 2026-10-17 15:09 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  11. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  13. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-10-12 16:10 UTCEG score recompute
  15. 2026-10-11 19:53 UTCEG score recompute
  16. 2026-10-11 17:06 UTCEG score recompute
  17. 2026-10-11 14:33 UTCEG score recompute
  18. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  19. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  20. 2026-10-10 05:48 UTCEG score recompute
  21. 2026-10-10 05:48 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  22. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  23. 2026-10-09 03:15 UTCEG score recompute
  24. 2026-10-09 03:15 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 37th percentile
Show 74 more
  1. 2026-10-08 01:26 UTCEG score recompute
  2. 2026-10-08 01:26 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  3. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  4. 2026-10-07 07:07 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  5. 2026-10-06 19:19 UTCEG score recompute
  6. 2026-10-06 19:19 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  7. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  8. 2026-10-06 07:34 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-10-05 19:12 UTCEG score recompute
  10. 2026-10-05 19:12 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  11. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  12. 2026-10-05 07:26 UTCEG score recompute
  13. 2026-10-05 07:26 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-10-04 19:40 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  16. 2026-10-04 07:06 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-10-03 19:22 UTCEG score recompute
  18. 2026-10-03 19:22 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  20. 2026-10-03 07:11 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  21. 2026-10-02 19:25 UTCEG score recompute
  22. 2026-10-02 19:25 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-10-02 07:40 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-10-01 19:54 UTCEG score recompute
  25. 2026-10-01 19:54 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  26. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  27. 2026-10-01 07:41 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  28. 2026-09-30 19:57 UTCEG score recompute
  29. 2026-09-30 19:57 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  30. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  31. 2026-09-30 05:57 UTCEG score recompute
  32. 2026-09-30 05:57 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  33. 2026-09-29 12:22 UTCEG score recompute
  34. 2026-09-29 12:22 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  35. 2026-09-28 21:19 UTCEG score recompute
  36. 2026-09-28 21:19 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  37. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  38. 2026-09-28 06:46 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  39. 2026-09-27 19:01 UTCEG score recompute
  40. 2026-09-27 19:01 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  41. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  42. 2026-09-27 07:16 UTCEG score recompute
  43. 2026-09-27 07:16 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  44. 2026-09-26 19:32 UTCEG score recompute
  45. 2026-09-26 19:31 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  46. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  47. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  48. 2026-09-25 07:10 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  49. 2026-09-24 19:24 UTCEG score recompute
  50. 2026-09-24 19:24 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  51. 2026-09-24 07:40 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-09-23 19:55 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  53. 2026-09-23 08:02 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  54. 2026-09-22 20:17 UTCEG score recompute
  55. 2026-09-22 20:17 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  56. 2026-09-22 08:30 UTCEG score recompute
  57. 2026-09-22 08:30 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  58. 2026-09-21 20:45 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  59. 2026-09-21 09:00 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  60. 2026-09-20 21:16 UTCEG score recompute
  61. 2026-09-20 21:16 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  62. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  63. 2026-09-20 09:31 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  64. 2026-09-19 21:46 UTCEG score recompute
  65. 2026-09-19 21:46 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  66. 2026-09-19 10:02 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  67. 2026-09-18 21:30 UTCEG score recompute
  68. 2026-09-18 21:30 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  69. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  70. 2026-09-18 08:41 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  71. 2026-09-17 20:56 UTCEG score recompute
  72. 2026-09-17 20:56 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  74. 2026-09-17 06:51 UTCGHSA enrichmentGHSA-gpjg-x49v-595v · GitHub severity HIGH · GitHub CVSS 7.5

Frequently asked(5)

What is CVE-2026-38347?
CVE-2026-38347 is a high-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-38347 published?
The CVE record for CVE-2026-38347 was published on August 27, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 8, 2026; the record at its source may have been updated since.
Is CVE-2026-38347 actively exploited?
CVE-2026-38347 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-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?
A fix for CVE-2026-38347 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-38347 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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