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Medium severity5.4NVD Advisory· Published Jul 24, 2026· Updated Aug 24, 2026

CVE-2026-66338

CVE-2026-66338

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

7
  • Red Hat/libsoupllm-fuzzy
  • GNOME Foundation/Libsoup
    cpe:2.3:a:gnome:libsoup:-:*:*:*:*:*:*:*
  • Red Hat/Enterprise Linux Server5 versions
    cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*+ 4 more
    • cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*
    • cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*

Patches

Vulnerability mechanics

References

2

News mentions

0

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