CVE-2026-40929

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-04-14. NVD baseline CVSS 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.4Exploit: Elevated riskExposed: 0

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

WWBN AVideo is an open source video platform. In versions 29.0 and prior, objects/commentDelete.json.php is a state-mutating JSON endpoint that deletes comments but performs no CSRF validation. It does not call forbidIfIsUntrustedRequest(), does not verify a CSRF/global token, and does not check Origin/Referer. Because AVideo intentionally sets session.cookie_samesite=None (to support cross-origin embed players), a cross-site request from any attacker-controlled page automatically carries the victim's PHPSESSID. Any authenticated victim who has authority to delete one or more comments (site moderators, video owners, and comment authors) can be tricked into deleting comments en masse simply by visiting an attacker page. Commit 184f36b1896f3364f864f17c1acca3dd8df3af27 contains a fix.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity54% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

April 21, 2026

Last Modified

April 23, 2026

Advisory Details (2)

Auto-updated Aug 2, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Missing CSRF protection in objects/commentDelete.json.php enables mass comment deletion against moderators and content creators · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-8qm8-g55h-xmqr
github_commit

commit 184f36b1896f (WWBN/AVideo)

Fix landed in WWBN/AVideo commit 184f36b1896f — awaiting tagged release

https://github.com/WWBN/AVideo/commit/184f36b1896f3364f864f17c1acca3dd8df3af27

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
composerwwbn/avideo—ghsa

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

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
wwbn/avideo10.4 ... 29.0 (18 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 23× 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.

Showing the most recent 100 of 158 total refreshes for this CVE.

  1. 2026-09-15 03:11 UTCEPSS rescore
  2. 2026-09-13 16:47 UTCEPSS rescore
  3. 2026-09-12 15:01 UTCEPSS rescore
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  9. 2026-09-02 03:09 UTCOSV refresh
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  24. 2026-08-16 06:05 UTCEG score recompute
  25. 2026-08-16 06:05 UTCGHSA enrichment
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  1. 2026-08-16 02:14 UTCEPSS rescore
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  3. 2026-08-14 04:23 UTCEG score recompute
  4. 2026-08-14 04:23 UTCGHSA enrichment
  5. 2026-08-13 22:00 UTCEPSS rescore
  6. 2026-08-12 18:35 UTCEG score recompute
  7. 2026-08-12 18:35 UTCGHSA enrichment
  8. 2026-08-12 13:51 UTCEPSS rescore
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  10. 2026-08-11 06:36 UTCEG score recompute
  11. 2026-08-11 06:36 UTCGHSA enrichment
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  13. 2026-08-10 05:06 UTCEG score recompute
  14. 2026-08-10 05:06 UTCGHSA enrichment
  15. 2026-08-09 13:46 UTCEPSS rescore
  16. 2026-08-09 03:37 UTCEG score recompute
  17. 2026-08-09 03:37 UTCGHSA enrichment
  18. 2026-08-08 16:37 UTCEPSS rescore
  19. 2026-08-07 12:53 UTCEG score recompute
  20. 2026-08-07 12:53 UTCGHSA enrichment
  21. 2026-08-06 13:46 UTCEPSS rescore
  22. 2026-08-05 23:07 UTCEG score recompute
  23. 2026-08-05 23:07 UTCGHSA enrichment
  24. 2026-08-05 19:17 UTCEPSS rescore
  25. 2026-08-04 15:10 UTCEPSS rescore
  26. 2026-08-03 21:19 UTCEG score recompute
  27. 2026-08-03 21:19 UTCGHSA enrichment
  28. 2026-08-03 10:36 UTCEPSS rescore
  29. 2026-08-02 12:40 UTCEG score recompute
  30. 2026-08-02 12:40 UTCGHSA enrichment
  31. 2026-08-02 02:27 UTCEPSS rescore
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  40. 2026-07-23 14:18 UTCEPSS rescore
  41. 2026-07-23 03:11 UTCEG score recompute
  42. 2026-07-22 14:08 UTCEPSS rescore
  43. 2026-07-21 15:24 UTCEPSS rescore
  44. 2026-07-20 17:08 UTCEPSS rescore
  45. 2026-07-20 04:46 UTCOSV refresh
  46. 2026-07-19 14:31 UTCEPSS rescore
  47. 2026-07-18 10:04 UTCEPSS rescore
  48. 2026-07-16 17:03 UTCEPSS rescore
  49. 2026-07-15 16:57 UTCEPSS rescore
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  72. 2026-06-21 14:56 UTCEPSS rescore
  73. 2026-06-21 14:56 UTCEPSS rescore
  74. 2026-06-21 01:59 UTCEPSS rescore
  75. 2026-06-19 19:25 UTCEPSS rescore

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-40929?
CVE-2026-40929 is a medium vulnerability published on April 21, 2026. WWBN AVideo is an open source video platform. In versions 29.0 and prior, objects/commentDelete.json.php is a state-mutating JSON endpoint that deletes comments but performs no CSRF validation. It does not call forbidIfIsUntrustedRequest(), does not verify a CSRF/global token, and does not check…
When was CVE-2026-40929 disclosed?
CVE-2026-40929 was first published in the National Vulnerability Database on April 21, 2026, with the most recent update on April 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40929 actively exploited?
CVE-2026-40929 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 98.4% of all scored CVEs.
What is the CVSS score of CVE-2026-40929?
CVE-2026-40929 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-40929?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40929, 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.

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