CVE-2026-49279

HIGHPre-NVD 7.77.7
EchelonGraph scoreLOW confidence

This high-severity CVE scores 7.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.1%, top 68% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
7.7
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.7Exploit: NoneExposed: 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. Versions 29.0 and below contain a Stored XSS vulnerability through the autoEvalCodeOnHTML parameter in the MessageSQLite WebSocket Handler. The MessageSQLite.php handler only strips autoEvalCodeOnHTML from $json['msg'], but msgToResourceId() reads from $msg['json'] with higher priority. An attacker can place the XSS payload in the json key instead of msg, bypassing the sanitization entirely. An authenticated attacker can execute arbitrary JavaScript in any connected user's browser session via the WebSocket messaging system, stealing session cookies and authentication tokens, taking over accounts through session hijacking, and chaining with CSRF to perform admin actions on the victim's behalf, in the default SQLite WebSocket backend configuration. This issue has a patch that has yet to be officially released, see https://github.com/WWBN/AVideo/commit/3e0b3ce2bfa766183ff0ae227439394db57b1a23.

CVSS v3
7.7
EG Score
7.7(low)
EG Risk
—
EPSS
25.0%
KEV
Not listed

Published

June 4, 2026

Last Modified

July 18, 2026

Advisory Details (2)

Auto-updated Jul 15, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

Stored XSS via autoEvalCodeOnHTML in MessageSQLite WebSocket Handler · Advisory · WWBN/AVideo · GitHub

https://github.com/WWBN/AVideo/security/advisories/GHSA-2fhx-q92v-5fhv
github_commit

commit 3e0b3ce2bfa7 (WWBN/AVideo)

Fix landed in WWBN/AVideo commit 3e0b3ce2bfa7 — awaiting tagged release

https://github.com/WWBN/AVideo/commit/3e0b3ce2bfa766183ff0ae227439394db57b1a23

Vendor Advisories for CVE-2026-49279(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 / 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 9× in last 7d / 19× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 17:03 UTCEPSS rescore
  9. 2026-07-16 10:27 UTCGHSA enrichment
  10. 2026-07-15 21:24 UTCEG score recompute▲ 7.70
  11. 2026-07-15 21:24 UTCGHSA enrichment
  12. 2026-07-15 21:23 UTCMITRE cvelistV5CVSS v3 → 7.7 · CVSS v4 → 7.7
  13. 2026-07-14 16:25 UTCGHSA enrichment
  14. 2026-07-11 12:37 UTCGHSA enrichment
  15. 2026-07-08 09:36 UTCGHSA enrichment
  16. 2026-07-03 19:15 UTCGHSA enrichment
  17. 2026-06-30 00:51 UTCGHSA enrichment
  18. 2026-06-26 21:49 UTCGHSA enrichment
  19. 2026-06-23 18:43 UTCGHSA enrichment
  20. 2026-06-20 12:08 UTCGHSA enrichment
  21. 2026-06-17 07:32 UTCGHSA enrichment
  22. 2026-06-14 23:18 UTCEPSS rescore
  23. 2026-06-14 04:22 UTCGHSA enrichment
  24. 2026-06-13 23:00 UTCEPSS rescore
  25. 2026-06-12 23:12 UTCEPSS rescore
Show 4 more
  1. 2026-06-11 01:12 UTCGHSA enrichment
  2. 2026-06-07 22:10 UTCGHSA enrichment
  3. 2026-06-04 19:10 UTCEG score recompute
  4. 2026-06-04 19:10 UTCGHSA enrichment

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-49279?
CVE-2026-49279 is a high vulnerability published on June 4, 2026. WWBN AVideo is an open source video platform. Versions 29.0 and below contain a Stored XSS vulnerability through the autoEvalCodeOnHTML parameter in the MessageSQLite WebSocket Handler. The MessageSQLite.php handler only strips autoEvalCodeOnHTML from $json['msg'], but msgToResourceId() reads from…
When was CVE-2026-49279 disclosed?
CVE-2026-49279 was first published in the National Vulnerability Database on June 4, 2026, with the most recent update on July 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49279 actively exploited?
CVE-2026-49279 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 25.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-49279?
CVE-2026-49279 has a CVSS v3 base score of 7.7 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-49279?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49279, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-49279

Explore →

Is Your Infrastructure Affected by CVE-2026-49279?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs