libsoup. A remote attacker · CWE-444
Source GCVE Database
Not known to be exploited · CVSS 4.8 Medium.
Data as of 3 Nov 2026, 03:59 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 4.8 |
|---|
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 29 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10libsoup3 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 6libsoup | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7libsoup | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8libsoup | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9libsoup | Affected– | Fixed in– |
AI-suggested
Since exploitation requires a specialized network topology, review your deployment architecture to avoid using libsoup behind or in front of non-libsoup proxies with differing HTTP chunk parsing. Monitor Red Hat advisories for updates and patches. No immediate mitigation actions are specified by the vendor.
Description
A vulnerability in libsoup's soup_body_input_stream_read_chunked() function allows a remote attacker to exploit an unsigned to signed conversion error by sending a malicious HTTP request. This flaw occurs in specific network topologies where libsoup operates behind or in front of a non-libsoup proxy server, potentially enabling request smuggling. Exploitation can lead to bypassing security controls, poisoning web caches, or unauthorized access. The vulnerability is rated moderate due to the specialized conditions required for exploitation and is primarily relevant in non-standard deployments.
References
- nvd.nist.gov/vuln/detail/CVE-2026-6324 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-6324 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2458479 (opens in a new tab)
- gitlab.gnome.org/GNOME/libsoup/-/commit/96ac392b444d01bd5de1d1276b187c3ed49d048c (opens in a new tab)
- gitlab.gnome.org/GNOME/libsoup/-/issues/508 (opens in a new tab)
- gitlab.gnome.org/GNOME/libsoup/-/work_items/508 (opens in a new tab)