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.
Published: 2026-04-23
Score: 3.7 Low
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 04 May 2026 18:30:00 +0000

Type Values Removed Values Added
First Time appeared Gnome
Gnome libsoup
CPEs cpe:2.3:a:gnome:libsoup:-:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
Vendors & Products Gnome
Gnome libsoup

Fri, 24 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 23 Apr 2026 22:00:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE. 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.
Title libsoup: libsoup: HTTP Request Smuggling via Duplicate Content-Length Headers Libsoup: libsoup: http request smuggling via duplicate content-length headers
First Time appeared Redhat
Redhat enterprise Linux
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References

Fri, 20 Feb 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Libsoup
Libsoup libsoup
Vendors & Products Libsoup
Libsoup libsoup

Fri, 20 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
Description No description is available for this CVE.
Title libsoup: libsoup: HTTP Request Smuggling via Duplicate Content-Length Headers
Weaknesses CWE-444
References
Metrics threat_severity

None

cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}

threat_severity

Low


Subscriptions

Gnome Libsoup
Libsoup Libsoup
Redhat Enterprise Linux
cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-04-24T14:55:14.618Z

Reserved: 2026-02-18T19:54:50.873Z

Link: CVE-2026-2708

cve-icon Vulnrichment

Updated: 2026-04-24T14:55:03.939Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-23T22:16:29.233

Modified: 2026-05-04T18:28:46.040

Link: CVE-2026-2708

cve-icon Redhat

Severity : Low

Publid Date: 2026-02-18T20:13:57Z

Links: CVE-2026-2708 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-02-20T10:11:35Z

Weaknesses