CVE-2026-41056

Description

WWBN AVideo is an open source video platform. In versions 29.0 and below, the `allowOrigin($allowAll=true)` function in `objects/functions.php` reflects any arbitrary `Origin` header back in `Access-Control-Allow-Origin` along with `Access-Control-Allow-Credentials: true`. This function is called by both `plugin/API/get.json.php` and `plugin/API/set.json.php` — the primary API endpoints that handle user data retrieval, authentication, livestream credentials, and state-changing operations. Combined with the application's `SameSite=None` session cookie policy, any website can make credentialed cross-origin requests and read authenticated API responses, enabling theft of user PII, livestream keys, and performing state changes on behalf of the victim. Commit caf705f38eae0ccfac4c3af1587781355d24495e contains a fix.

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CVSS v3.1 Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0007

Probability of exploitation

0.22%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-942 CWE-942

Affected Products

Vendor	Product	Versions
wwbn	avideo	< 29.0

References

Advisories & Patches

https://github.com/WWBN/AVideo/commit/caf705f38eae0ccfac4c3af1587781355d24495e https://github.com/WWBN/AVideo/security/advisories/GHSA-ccq9-r5cw-5hwq https://github.com/WWBN/AVideo/security/advisories/GHSA-ccq9-r5cw-5hwq

Exploits

https://github.com/WWBN/AVideo/security/advisories/GHSA-ccq9-r5cw-5hwq https://github.com/WWBN/AVideo/security/advisories/GHSA-ccq9-r5cw-5hwq

Frequently Asked Questions

What is CVE-2026-41056? +

WWBN AVideo is an open source video platform. In versions 29.0 and below, the `allowOrigin($allowAll=true)` function in `objects/functions.php` reflects any arbitrary `Origin` header back in `Access-Control-Allow-Origin` along with `Access-Control-Allow-Credentials: true`. This function is called by both `plugin/API/get.json.php` and `plugin/API/set.json.php` — the primary API endpoints that handle user data retrieval, authentication, livestream credentials, and state-changing operations. Combined with the application's `SameSite=None` session cookie policy, any website can make credentialed cross-origin requests and read authenticated API responses, enabling theft of user PII, livestream keys, and performing state changes on behalf of the victim. Commit caf705f38eae0ccfac4c3af1587781355d24495e contains a fix. It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-41056? +

CVE-2026-41056 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0007, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-41056? +

CVE-2026-41056 affects products from wwbn, specifically: avideo. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-41056? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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