CVE Catalog

CVE-2026-4984

HighCVSS 8.2
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.16%

5th percentile - higher than 5% of all known CVEs

Summary

The Twilio integration webhook handler accepts any POST request without validating 'X-Twilio-Signature'. When processing media messages, it fetches user-controlled URLs, potentially leading to the exposure of Twilio account credentials.

Risk Assessment

An attacker can forge a webhook payload, resulting in the exposure of 'accountSID' and 'authToken' in plaintext, leading to full compromise of the Twilio account.

Recommendation

It is recommended to implement validation of the 'X-Twilio-Signature' for all POST requests and to avoid fetching user-controlled URLs without proper security measures.

Related vulnerabilities

Original NVD description (English source)

The Twilio integration webhook handler accepts any POST request without validating Twilio's 'X-Twilio-Signature'. When processing media messages, it fetches user-controlled URLs ('MediaUrlN' parameters) using HTTP requests that include the integration's Twilio credentials in the 'Authorization' header. An attacker can forge a webhook payload pointing to their own server and receive the victim's 'accountSID' and 'authToken' in plaintext (base64-encoded Basic Auth), leading to full compromise of the Twilio account.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS