cvedb.io
CVE-2026-66338
MEDIUM · CVSS 5.4
EPSS exploitation probability: 0%
Published 2026-07-24T23:16:52.040 · Last modified 2026-07-24T23:16:52.040

Summary

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.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.