WWBN AVideo is an open source video platform. In versions up to and including 26.0, the ImageGallery::saveFile() method validates uploaded file content using finfo MIME type detection but derives the saved filename extension from the user-supplied original filename without an allowlist check. An attacker can upload a polyglot file (valid JPEG magic bytes followed by PHP code) with a .php extension. The MIME check passes, but the file is saved as an executable .php file in a web-accessible directory, achieving Remote Code Execution. Commit 345a8d3ece0ad1e1b71a704c1579cbf885d8f3ae contains a patch.
CVE-2026-33647
HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence
Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-03-25. a secondary CVSS source baseline 8.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, secondary
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 8.8
- EG Score
- 8.8(medium)
- EG Risk
- 44(Track)EG Risk 44/100SSVC: 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 computedSeverity88% × 45%Exploitation0% × 40%Automatability30% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 1%
- EPSS %ILE
- 47%
- KEV
- Not listed
Published
March 23, 2026
Last Modified
June 17, 2026
Advisory Details (2)
Auto-updated Jul 27, 2026🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available
Remote Code Execution via MIME/Extension Mismatch in ImageGallery File Upload · Advisory · WWBN/AVideo · GitHub
https://github.com/WWBN/AVideo/security/advisories/GHSA-wxjw-phj6-g75wgithub_commit Patch Available
commit 345a8d3ece0a (WWBN/AVideo)
Patch available: WWBN/AVideo 29.0 (contains commit 345a8d3ece0a)
https://github.com/WWBN/AVideo/commit/345a8d3ece0ad1e1b71a704c1579cbf885d8f3aePatch Availability(1)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| composer | wwbn/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.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 2× in last 7d / 2× 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.
- 2026-07-27 14:32 UTCEG score recompute
- 2026-07-27 14:32 UTCGHSA enrichment
Related CVEs(same product + same CWE)
Same product
10 showncomposer:wwbn/avideo
Same CWE
10 shownCWE-434
Frequently asked(5)
What is CVE-2026-33647?
CVE-2026-33647 is a high vulnerability published on March 23, 2026. WWBN AVideo is an open source video platform. In versions up to and including 26.0, the ImageGallery::saveFile() method validates uploaded file content using finfo MIME type detection but derives the saved filename extension from the user-supplied original filename without an allowlist check. An…
When was CVE-2026-33647 disclosed?
CVE-2026-33647 was first published in the National Vulnerability Database on March 23, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33647 actively exploited?
CVE-2026-33647 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 53.0% of all scored CVEs.
What is the CVSS score of CVE-2026-33647?
CVE-2026-33647 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-33647?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33647, 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
Explore the affected products and dependency analysis for CVE-2026-33647
Is Your Infrastructure Affected by CVE-2026-33647?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.