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CVE-2026-4984

8.2 · HIGH

The Twilio integration webhook handler accepts any POST request without validating Twilio's 'X-Twilio-Signature'.

Published Mar 27, 2026CWE-345EPSS 0.18%

Overview

CVE-2026-4984 is a high-severity vulnerability. It was published on March 27, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.tenable.com/security/research/tra-2026-22

How CyberStrike helps

Frequently asked questions

What is CVE-2026-4984?

CVE-2026-4984 is a high-severity vulnerability. It was published on March 27, 2026 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2026-4984?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-4984?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-4984?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-4984 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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