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AVideo CVE-2026-82645

| EUVDEUVD-2026-68231 CRITICAL
Improper Verification of Cryptographic Signature (CWE-347)
2026-08-30 VulnCheck GHSA-hwrr-6f7r-qpch
PHP Information Disclosure Oracle Jwt Attack Avideo Wwbn
9.2
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
9.2 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
8.6 HIGH

Remote, low-complexity, unauthenticated forgery via a public oracle (AV:N/AC:L/PR:N/UI:N); scope changes (S:C) because disclosed stream keys compromise external platform accounts; confidentiality-only, so I:N/A:N.

3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

2
CVE Published
Aug 31, 2026 - 10:50 cve.org
CRITICAL 9.2
Analysis Generated
Aug 30, 2026 - 15:01 vuln.today

DescriptionCVE.org

AVideo (current commit e01e41ecc and earlier) exposes stream credentials through the plugin/Live/view/Live_restreams/getLiveKey.json.php endpoint. Supplying a 'token' request parameter waives both the Live::canRestream() access gate and the restream ownership check, causing the endpoint to return any restream's stream_key and stream_url (credentials for external platforms such as YouTube, Facebook, and Twitch) without authentication. The token is merely encryptString() of an integer id with no user binding, expiry, or authentication tag. Because encryption uses AES-256-CBC with a deterministic IV and no MAC, and because intval() accepts any string beginning with a digit, an unauthenticated attacker can forge valid tokens using the public encryption oracle in view/url2Embed.json.php, disclosing arbitrary users' stream credentials.

AnalysisAI

Unauthenticated stream credential disclosure in AVideo (WWBN, commit e01e41ecc and earlier) lets remote attackers retrieve any user's restream stream_key and stream_url for external platforms like YouTube, Facebook, and Twitch. The getLiveKey.json.php endpoint accepts a 'token' parameter that bypasses both the Live::canRestream() access gate and the restream ownership check, and the token is merely AES-256-CBC encryptString() of an integer id with no user binding, expiry, or authentication tag. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation No special conditions beyond a reachable AVideo instance with the Live/restream plugin enabled - remote unauthenticated exploitation works against default configurations where the getLiveKey.json.php and url2Embed.json.php endpoints are network-accessible (AV:N/AC:L/PR:N/UI:N). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N, base 9.2 Critical) is well supported by the description: fully network-reachable, low complexity, no privileges, no user interaction, high confidentiality impact on both the vulnerable system and subsequent systems (the external streaming accounts whose credentials leak). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the vendor fix referenced in GHSA-c4w3-h888-7ccv (https://github.com/WWBN/AVideo/security/advisories/GHSA-c4w3-h888-7ccv) - no exact patched version number is provided in the input, so treat this as 'upstream fix available per advisory; released patched version not independently confirmed' and pull the latest AVideo commit after the advisory. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-82645 vulnerability details – vuln.today
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