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CVE intelligence

CVE-2026-6324

Vulnerability intelligence

Published May 29, 2026Sources checked Nov 11, 2026
4.8MEDIUMCVSS out of 10
What this means

Review the available evidence

CVE-2026-6324 and is rated Medium severity with a CVSS score of 4.8. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Ubuntu Security Notices guidance

Vendor revision: Nov 9, 2026

USN-8890-1 fixed vulnerabilities in libsoup.

Ubuntu Security Notices guidance

Vendor revision: Oct 21, 2026

USN-8890-1 fixed vulnerabilities in libsoup.

Microsoft Security Response Center guidance

Vendor revision: Jun 28, 2026

CBL-Mariner Releases

Vendor-listed releases

  • 3.4.4-16
CISA KEVNot listedBased on the latest collected catalog
EPSS1.3%Estimated 30-day exploitation probability
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview

What is CVE-2026-6324?

A flaw was found in libsoup. A remote attacker could exploit an unsigned to signed conversion error in the `soup_body_input_stream_read_chunked()` function by sending a malicious HTTP request.

This vulnerability occurs when libsoup operates behind a non-libsoup proxy server or as a proxy in front of a non-libsoup backend server. Successful exploitation can allow an attacker to bypass security controls, poison web caches, or gain unauthorized access.

Source: NVD