CVE-2026-4984
High · 8.2CVSS
8.2
EPSS
0.2%
Published
Mar 27, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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