CVE-2026-40935: WWBN AVideo is an open source video platform

Q: How do I fix CVE-2026-40935?

avideo: upgrade to newer than 29.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-40935 being exploited?

CVE-2026-40935 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-40935 affect?

CVE-2026-40935 affects avideo. Severity is medium (CVSS 5.3). WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/getCaptcha.php` accepts the CAPTCHA length (`ql`) directly from the query string with no clamping or sanitization, letting any unauthenticated client force t

Q: How urgent is CVE-2026-40935?

Priority 32/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-40935 is a medium-severity flaw (CVSS 5.3) affecting avideo. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/getCaptcha.php` accepts the CAPTCHA length (`ql`) directly from the query string with no clamping or sanitization, letting any unauthenticated client force the server to generate a 1-character CAPTCHA word. Combined with a case-insensitive `strcasecmp` comparison over a ~33-character alphabet and the fact that failed validations do NOT consume the stored session to

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-804
Published	2026-04-21
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: wwbn

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-21 23:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

wwbn avideo UPGRADE

Affected: <= 29.0

Fixed in: newer than 29.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy avideo || rpm -q avideo || avideo --version

2. UPGRADE to newer than 29.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade avideo

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade avideo

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-40935?

avideo: upgrade to newer than 29.0. Exact commands for each OS are on this page.

Is CVE-2026-40935 being exploited?

CVE-2026-40935 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-40935 affect?

CVE-2026-40935 affects avideo. Severity is medium (CVSS 5.3). WWBN AVideo is an open source video platform. In versions 29.0 and prior, `objects/getCaptcha.php` accepts the CAPTCHA length (`ql`) directly from the query string with no clamping or sanitization, letting any unauthenticated client force t

How urgent is CVE-2026-40935?

Priority 32/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

Related CVEs

CVE-2026-41304 CRITICAL 9.8 UPGRADE WWBN AVideo is an open source video platform
CVE-2026-40911 CRITICAL 10.0 UPGRADE WWBN AVideo is an open source video platform
CVE-2026-34374 CRITICAL 9.1 UPGRADE WWBN AVideo is an open source video platform
CVE-2026-33767 HIGH 8.8 UPGRADE WWBN AVideo is an open source video platform
CVE-2026-41062 MEDIUM 6.5 UPGRADE WWBN AVideo is an open source video platform

References

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