Medium severity · published Jan 28, 2026
CVE-2026-1536
A flaw was found in libsoup
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
A flaw was found in libsoup. An attacker who can control the input for the Content-Disposition header can inject CRLF (Carriage Return Line Feed) sequences into the header value. These sequences are then interpreted verbatim when the HTTP request or response is constructed, allowing arbitrary HTTP headers to be injected. This vulnerability can lead to HTTP header injection or HTTP response splitting without requiring authentication or user interaction.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
6.0; 7.0; 8.0; 9.0; 10.0 · source: NVD
LI
Libsoup · Gnome
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1536
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1536
Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-1536
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2433834
Exploit
https://gitlab.gnome.org/GNOME/libsoup/-/issues/486
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