CVE-2026-3634Low· 3.9▾ TwilightPoC availableA flaw was found in libsoup. An attacker controlling the value used to set the Content-Type header can inject a Carriage Return Line Feed (CRLF) sequence due to improper input sanitization in the `soup_message_headers_set_content_type()`…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 21.5 · likelihood 0 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
A flaw was found in libsoup. An attacker controlling the value used to set the Content-Type header can inject a Carriage Return Line Feed (CRLF) sequence due to improper input sanitization in the soup_message_headers_set_content_type() function. This vulnerability allows for the injection of arbitrary header-value pairs, potentially leading to HTTP header injection and response splitting attacks.
libsoup3 (all versions)libsouplibsoup (all versions)libsoup (all versions)libsoup (all versions)Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-1536Medium· 5.8Libsoup: libsoup: http header injection or response splitting via crlf injection in content-disposition header
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CVE-2026-3633Low· 3.9Libsoup: libsoup: header and http request injection via crlf injection
CVE-2026-77680Medium· 5.3Libsoup3: libsoup: quadratic cpu denial of service in http range coalescing after cve-2025-32907 fix
CVE-2026-4271Medium· 5.3Libsoup: libsoup: denial of service via use-after-free in http/2 server
CVE-2026-12548Medium· 4.2Libsoup: heap out-of-bounds read in libsoup due to integer truncation