HTTP Request Smuggling Flaw in libsoup Affects Red Hat Products
CVE-2026-1801

5.3MEDIUM

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Vendor
CVE Published:
3 February 2026

What is CVE-2026-1801?

An issue exists in libsoup, an HTTP client/server library, related to HTTP Request Smuggling due to non-RFC-compliant parsing in the soup_filter_input_stream_read_line() function. This vulnerability allows an attacker to send specially crafted chunked requests, which can be misinterpreted by libsoup due to accepting malformed chunk headers. As a result, the library may improperly parse multiple HTTP requests from a single network message, potentially leading to information exposure without authentication or user interaction.

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References

https://access.redhat.com/security/cve/CVE-2026-1801
vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2436315
issue-trackingx_refsource_REDHAT

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank Ahmed Lekssays for reporting this issue.
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