CVE-2026-56346 — wwbn/avideo
CVE-2026-56346 is a Missing Authentication vulnerability in wwbn/avideo. No vendor fix is recorded yet; mitigation options are listed below.
AVideo - Unauthenticated PGP Message Decryption via decryptMessage.json.php Endpoint
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.
- CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
Exploitation and automatability from CISA’s SSVC triage for CVE-2026-56346.
EPSS Exploitation Probability
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
wwbn/avideoReal-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
The AVideo platform exposes a publicly accessible endpoint that performs server-side PGP decryption without requiring any form of authentication. Any anonymous user can submit a private key, ciphertext, and passphrase to the endpoint and receive the decrypted plaintext in the JSON response. This functionality is entirely unprotected, meaning no session, token, or credential is needed to invoke it.
Details
The endpoint at decryptMessage.json.php accepts a JSON body containing three user-supplied fields: a private key, an encrypted message, and a key password. The server passes these directly into a decryption routine and returns the result. There is no call to any authentication or session validation function before this operation is performed. The relevant server-side operation is:
$textDecrypted = decryptMessage($obj->textToDecrypt, $obj->privateKeyToDecryptMsg, $obj->keyPassword);
Because no access control exists, any unauthenticated request that reaches this endpoint will be processed. The primary concerns are exposure of private key material to server memory and logging infrastructure, and unconstrained consumption of server CPU resources for cryptographic operations. An attacker who has obtained a private key and matching ciphertext through other means can offload decryption work to the target server without holding any account on the platform.
PoC
curl -s -X POST \
"https://target.example.com/plugin/LoginControl/pgp/decryptMessage.json.php" \
-H "Content-Type: application/json" \
-d '{
"textToDecrypt": "-----BEGIN PGP MESSAGE-----\n<base64_ciphertext>\n-----END PGP MESSAGE-----",
"privateKeyToDecryptMsg": "-----BEGIN PGP PRIVATE KEY BLOCK-----\n<base64_private_key>\n-----END PGP PRIVATE KEY BLOCK-----",
"keyPassword": "passphrase"
}'
Impact
Private key material submitted to this endpoint is processed in server memory and may be captured in application logs, web server access logs, or error logs depending on server configuration. This can result in unintended disclosure of sensitive key material to administrators or anyone with log access. Additionally, the lack of any rate limiting combined with the absence of authentication allows any external party to submit large volumes of decryption requests, consuming server CPU resources without restriction. Any user who can reach the endpoint network-layer can trigger these effects.
Mitigation
A User::isLogged() check, or an equivalent session and authentication validation step, should be added at the top of decryptMessage.json.php before any user-supplied input is processed. Decryption operations should only be permitted for authenticated and authorized users. Server logging configuration should also be reviewed to ensure that POST body contents, including key material, are not written to persistent logs.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | wwbn/avideo | all versions | No fix |
Detection & mitigation playbook
Open-source dependencyDetect
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-2026-56346 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-2026-56346 can be triaged on real exposure rather than presence alone.
Tailored to CVE-2026-56346. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2026-56346 in your dependencies?
O3 Security finds CVE-2026-56346 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.