Vulnerability · Published Jan 28, 2026 · Assigned by redhat
CVE-2026-1536Libsoup: libsoup: http header injection or response splitting via crlf injection in content-disposition header
Medium 5.8
In plain English
A medium-severity security flaw in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libsoup2.4 | no fix listed | DEBIAN-CVE-2026-1536 |
| Debian:13 | libsoup2.4 | no fix listed | DEBIAN-CVE-2026-1536 |
| Debian:12 | libsoup3 | no fix listed | DEBIAN-CVE-2026-1536 |
| Debian:13 | libsoup3 | no fix listed | DEBIAN-CVE-2026-1536 |
| Ubuntu:25.10 | libsoup2.4 | no fix listed | UBUNTU-CVE-2026-1536 |
| Ubuntu:24.04:LTS | libsoup3 | 3.4.4-5ubuntu0.7 | USN-8020-1 |
| Ubuntu:24.04:LTS | libsoup3 | 3.4.4-5ubuntu0.7 | UBUNTU-CVE-2026-1536 |
| Ubuntu:25.10 | libsoup3 | 3.6.5-4ubuntu0.2 | USN-8020-1 |
| Ubuntu:25.10 | libsoup3 | 3.6.5-4ubuntu0.2 | UBUNTU-CVE-2026-1536 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 6 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-93 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
References
- https://access.redhat.com/security/cve/CVE-2026-1536 vdb-entry, x_refsource_REDHAT
- RHBZ#2433834 issue-tracking, x_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/486