CVE search · CVE-2026-66338
CVE-2026-66338
high 7.2
A flaw was found in libsoup. The chunked transfer encoding parser uses a permissive parsing function for chunk sizes that silently accepts inputs violating RFC 9112, including leading whitespace, plus sign prefixes, and trailing invalid characters. When libsoup operates behind a strict frontend proxy, this parsing differential can be exploited to smuggle HTTP requests.
Details
- Status
- Analyzed
- Published
- Last changed
- Source
- secalert@redhat.com
- Weakness
- CWE-444
Severity
| Version | Score | Vector | Source |
|---|---|---|---|
| CVSS 3.1 | medium 5.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N |
secalert@redhat.comSecondary |
| CVSS 3.1 | high 7.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N |
nvd@nist.govPrimary |
Affected products
Vendor and product from the NVD’s CPE applicability statements. Versions and conditions are on the NVD’s page.
References
- https://access.redhat.com/security/cve/CVE-2026-66338Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2506950ExploitIssue TrackingVendor Advisory