CVE-2026-2708
Last modified
CVE-2026-2708 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. The soup_message_headers_append_common() function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. EPSS estimates a 0.32% chance of exploitation in the next 30 days.
Description
A request smuggling vulnerability exists in libsoup's HTTP/1 header parsing logic. The soup_message_headers_append_common() function in libsoup/soup-message-headers.c unconditionally appends each header value without validating for duplicate or conflicting Content-Length fields. This allows an attacker to send HTTP requests containing multiple Content-Length headers with differing values.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gnome | Libsoup | All versions |
| Redhat | Enterprise Linux | 6.0 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
| Redhat | Enterprise Linux | 10.0 |
References
- https://access.redhat.com/security/cve/CVE-2026-2708Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2440743Issue Tracking, Vendor Advisory
- https://gitlab.gnome.org/GNOME/libsoup/-/issues/500Exploit, Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-2708?
How severe is CVE-2026-2708?
How do I fix CVE-2026-2708?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-27074Improper Neutralization of Input During Web Page Generation …6.5
- CVE-2026-27075Improper Control of Filename for Include/Require Statement i…8.1
- CVE-2026-27076Improper Control of Filename for Include/Require Statement i…8.1
- CVE-2026-27077Improper Control of Filename for Include/Require Statement i…8.1
- CVE-2026-27078Improper Control of Filename for Include/Require Statement i…8.1
- CVE-2026-27079Improper Control of Filename for Include/Require Statement i…8.1
- CVE-2026-27080Improper Control of Filename for Include/Require Statement i…8.1
- CVE-2026-27081Improper Control of Filename for Include/Require Statement i…8.1
- CVE-2026-27082Deserialization of Untrusted Data vulnerability in ThemeREX …9.8
- CVE-2026-27083Deserialization of Untrusted Data vulnerability in ThemeREX …9.8
- CVE-2026-27084Deserialization of Untrusted Data vulnerability in ThemeREX …9.8
- CVE-2026-27087Improper Neutralization of Input During Web Page Generation …7.1
Are you affected by CVE-2026-2708?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST