CVE-2026-63305: AVideo through 29.0 contains an OS command injection vulnerability in the ffmpeg.json.php endpoint where notif

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HIGH 8.1REMOTE

CVE-2026-63305 is a high-severity flaw (CVSS 8.1) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

AVideo through 29.0 contains an OS command injection vulnerability in the ffmpeg.json.php endpoint where notifyCode and callback parameters are concatenated into a shell command without escaping. Attackers who can craft a valid encrypted payload can inject arbitrary shell metacharacters into these fields to execute OS commands as the web-server user.

Why this priority

High severity
CISA SSVC: public proof of concept
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	2.5% (top 16%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-07-16
Last modified	2026-10-24

Publisher (CNA): VulnCheck

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-07-16 13:16 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · conda · FIXED · 26.9.4-2.fc46 · FEDORA-2026-09931756f1 · source

sudo dnf upgrade --advisory=FEDORA-2026-09931756f1

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-2026-63305?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-63305 being exploited?

CVE-2026-63305 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-2026-63305 affect?

CVE-2026-63305 affects affected software. Severity is high (CVSS 8.1). AVideo through 29.0 contains an OS command injection vulnerability in the ffmpeg.json.php endpoint where notifyCode and callback parameters are concatenated into a shell command without escaping. Attackers who can craft a valid encrypted pa

How urgent is CVE-2026-63305?

Priority 57/100. High severity; CISA SSVC: public proof of concept; Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities · FFmpeg vulnerabilities

References

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