CVE-2026-2708

Name: CVE-2026-2708
Creator: NVD / NIST
Published: 2026-04-23T22:16:29.233+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.32%

Last modified Jun 17, 2026

CVE-2026-2708 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. The soup_message_headers_append_common() function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. EPSS estimates a 0.32% chance of exploitation in the next 30 days.

Description

A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. The soup_message_headers_append_common() function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. This allows an attacker to send HTTP requests containing multiple Content-Length headers with differing values.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.32%

23.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-444

Affected Software

Vendor	Product	Versions
Gnome	Libsoup	All versions
Redhat	Enterprise Linux	6.0
Redhat	Enterprise Linux	7.0
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux	9.0
Redhat	Enterprise Linux	10.0

References

https://access.redhat.com/security/cve/CVE-2026-2708Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2440743Issue Tracking, Vendor Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/issues/500Exploit, Issue Tracking, Vendor Advisory
https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/513Issue Tracking

Timeline

Published: Apr 23, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-2708?

How severe is CVE-2026-2708?

CVE-2026-2708 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.32% probability of exploitation in the next 30 days.

How do I fix CVE-2026-2708?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-2708?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST