CVE-2026-73433

MEDIUMPre-NVD 6.66.6—
EchelonGraph scoreHIGH confidence

Score 6.6 from GitHub Security Advisory published 2026-08-12. a secondary CVSS source baseline 6.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
6.6EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.6Exploit: None knownExposed: 0

A fix is available — apply it.

A flaw was found in GStreamer gst-plugins-good (avidemux). When parsing FUJIFILM metadata in an AVI strd chunk, gst_avi_demux_parse_strd() decrements a remaining-length counter by fixed offsets (98 and 10 bytes) without verifying sufficient data remains. For crafted strd payloads of exactly 106 or 107 bytes, the counter underflows to a very large unsigned value, causing subsequent null-terminated string scanning to read far beyond the allocated heap buffer. Date-format normalization may also write beyond the buffer end. Confirmed impacts include heap out-of-bounds read, out-of-bounds write, heap information disclosure (adjacent data appearing in parsed metadata), and application crash/denial of service. The avidemux element is auto-plugged by playbin, decodebin, and gst-discoverer, so opening or previewing a crafted AVI is sufficient to trigger the issue. Fixed upstream in gst-plugins-good 1.28.6 (GStreamer-SA-2026-0072).

CVSS v3
6.6
EG Score
6.6(high)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity66% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 12, 2026

Last Modified

August 19, 2026

Advisory Details (4)

Auto-updated Aug 12, 2026
Patch available. Sources: redhat.
generic

GStreamer Security Advisory

https://gstreamer.freedesktop.org/security/sa-2026-0072.html
generic

avidemux: Make sure enough data is available when parsing FUJIFILM strd and various other fixes (!12231) · Merge requests · GStreamer / gstreamer · GitLab

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12231
redhat

2514801 – (CVE-2026-73433) CVE-2026-73433 gstreamer1-plugins-good: gstreamer: unsigned integer underflow in avidemux FUJIFILM strd parsing leading to out-of-bounds read/write

https://bugzilla.redhat.com/show_bug.cgi?id=2514801
redhat Patch Available

CVE-2026-73433 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-73433

Vendor Advisories for CVE-2026-73433(4)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatgstreamer1-plugins-good-0:1.16.1-7.el8_10.32026-08-19redhat
redhatgstreamer1-plugins-good-0:1.26.7-2.el10_2.52026-08-17redhat
redhatgstreamer1-plugins-good-0:1.22.12-7.el9_8.42026-08-17redhat

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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 41× in last 7d / 54× 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. 2026-08-20 23:10 UTCEG score recompute
  2. 2026-08-20 23:10 UTCVendor advisory
  3. 2026-08-20 23:10 UTCGHSA enrichment
  4. 2026-08-20 22:56 UTCEPSS rescore
  5. 2026-08-19 21:20 UTCEG score recompute
  6. 2026-08-19 21:20 UTCVendor advisory
  7. 2026-08-19 21:20 UTCGHSA enrichment
  8. 2026-08-19 21:05 UTCEG score recompute
  9. 2026-08-19 21:05 UTCVendor advisory
  10. 2026-08-19 21:05 UTCGHSA enrichment
  11. 2026-08-19 17:04 UTCEPSS rescore
  12. 2026-08-18 21:39 UTCEG score recompute
  13. 2026-08-18 21:39 UTCVendor advisory
  14. 2026-08-18 21:38 UTCGHSA enrichment
  15. 2026-08-18 13:49 UTCEPSS rescore
  16. 2026-08-18 13:49 UTCEPSS rescore
  17. 2026-08-17 19:49 UTCEG score recompute
  18. 2026-08-17 19:49 UTCVendor advisory
  19. 2026-08-17 19:48 UTCGHSA enrichment
  20. 2026-08-17 13:47 UTCEPSS rescore
  21. 2026-08-17 08:23 UTCEG score recompute
  22. 2026-08-17 08:23 UTCGHSA enrichment
  23. 2026-08-17 07:32 UTCEG score recompute
  24. 2026-08-17 07:32 UTCGHSA enrichment
  25. 2026-08-17 04:29 UTCEG score recompute
Show 29 more
  1. 2026-08-17 04:29 UTCGHSA enrichment
  2. 2026-08-17 04:15 UTCEG score recompute
  3. 2026-08-17 04:15 UTCGHSA enrichment
  4. 2026-08-17 01:59 UTCEG score recompute
  5. 2026-08-17 01:59 UTCGHSA enrichment
  6. 2026-08-16 14:56 UTCEPSS rescore
  7. 2026-08-16 14:56 UTCEPSS rescore
  8. 2026-08-16 02:15 UTCEPSS rescore
  9. 2026-08-16 00:09 UTCEG score recompute
  10. 2026-08-16 00:09 UTCGHSA enrichment
  11. 2026-08-15 01:31 UTCEPSS rescore
  12. 2026-08-14 22:18 UTCEG score recompute
  13. 2026-08-14 22:18 UTCGHSA enrichment
  14. 2026-08-14 22:04 UTCEG score recompute
  15. 2026-08-14 22:04 UTCGHSA enrichment
  16. 2026-08-14 19:18 UTCGHSA enrichment
  17. 2026-08-14 00:11 UTCEG score recompute
  18. 2026-08-14 00:11 UTCGHSA enrichment
  19. 2026-08-13 22:00 UTCEPSS rescore
  20. 2026-08-12 22:21 UTCEG score recompute
  21. 2026-08-12 22:21 UTCGHSA enrichment
  22. 2026-08-12 22:01 UTCEG score recompute
  23. 2026-08-12 22:01 UTCGHSA enrichment
  24. 2026-08-12 21:21 UTCEG score recompute
  25. 2026-08-12 21:01 UTCEG score recompute▼ 1.00
  26. 2026-08-12 21:00 UTCMITRE cvelistV5CVSS v3 → 6.6 · severity → MEDIUM
  27. 2026-08-12 20:20 UTCEG score recompute
  28. 2026-08-12 19:21 UTCEG score recompute
  29. 2026-08-12 19:20 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-73433?
CVE-2026-73433 is a medium vulnerability published on August 12, 2026. A flaw was found in GStreamer gst-plugins-good (avidemux). When parsing FUJIFILM metadata in an AVI strd chunk, gstavidemuxparsestrd() decrements a remaining-length counter by fixed offsets (98 and 10 bytes) without verifying sufficient data remains. For crafted strd payloads of exactly 106 or 107…
When was CVE-2026-73433 disclosed?
CVE-2026-73433 was first published in the National Vulnerability Database on August 12, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73433 actively exploited?
CVE-2026-73433 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 96.8% of all scored CVEs.
What is the CVSS score of CVE-2026-73433?
CVE-2026-73433 has a CVSS v3 base score of 6.6 (NVD).
How do I remediate CVE-2026-73433?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73433, 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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