MEDIUMVulnerability
CVE-2026-66338
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.
Properties
- severity
- MEDIUM
- score
- 5.4
- cve_id
- CVE-2026-66338
- vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
- published_at
- 2026-07-24T23:16:52.040
- last_modified
- 2026-08-24T16:44:22.590
Related Entities (8)
HAS_WEAKNESS (1)
→[Weakness]Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
DESCRIBED_BY (1)
→[Source]NVD
AFFECTS_PRODUCT (6)
→[Product]
→[Product]
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