Vulnerability · Published Feb 2, 2026 · Assigned by redhat
CVE-2026-1760Libsoup: soupserver: denial of service via http request smuggling
Medium 5.3
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 0.5% (higher than 41% of all known vulnerabilities).
Official description
A flaw was found in SoupServer. This HTTP request smuggling vulnerability occurs because SoupServer improperly handles requests that combine Transfer-Encoding: chunked and Connection: keep-alive headers. A remote, unauthenticated client can exploit this by sending specially crafted requests, causing SoupServer to fail to close the connection as required by RFC 9112. This allows the attacker to smuggle additional requests over the persistent connection, leading to unintended request processing and potential denial-of-service (DoS) conditions.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libsoup2.4 | no fix listed | DEBIAN-CVE-2026-1760 |
| Debian:13 | libsoup2.4 | no fix listed | DEBIAN-CVE-2026-1760 |
| Debian:12 | libsoup3 | no fix listed | DEBIAN-CVE-2026-1760 |
| Debian:13 | libsoup3 | no fix listed | DEBIAN-CVE-2026-1760 |
| Ubuntu:22.04:LTS | libsoup2.4 | no fix listed | UBUNTU-CVE-2026-1760 |
| Ubuntu:24.04:LTS | libsoup2.4 | no fix listed | UBUNTU-CVE-2026-1760 |
| Ubuntu:25.10 | libsoup2.4 | no fix listed | UBUNTU-CVE-2026-1760 |
| Ubuntu:26.10 | libsoup2.4 | no fix listed | UBUNTU-CVE-2026-1760 |
| Ubuntu:24.04:LTS | libsoup3 | no fix listed | UBUNTU-CVE-2026-1760 |
| Ubuntu:25.10 | libsoup3 | no fix listed | UBUNTU-CVE-2026-1760 |
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-444 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
References
- https://access.redhat.com/security/cve/CVE-2026-1760 vdb-entry, x_refsource_REDHAT
- RHBZ#2435951 issue-tracking, x_refsource_REDHAT
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/475