CVE Watch28 ago 2026

CVE-2026-77341

cpp-httplib is a C++ header-only HTTP/HTTPS library. In version 0.49.0, the chunked-response trailer output path writes trailer header names

CVSS

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Sin CVSS

EPSS

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KEV

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Exploit Today

0-100

Publicado: 28 ago 2026 · Última mod.: 28 ago 2026 · CWE-93 · CWE-113

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

cpp-httplib is a C++ header-only HTTP/HTTPS library. In version 0.49.0, the chunked-response trailer output path writes trailer header names and values directly to the socket without validating them, allowing CRLF sequences in a trailer field to inject additional headers or split the HTTP response. Unlike every other header-writing path in the library, the trailer-writing code applies none of the field-name and field-value checks that reject carriage return and line feed, so an application that places attacker-influenced data into a chunked response trailer emits attacker-controlled CRLF onto the wire. This enables HTTP response splitting, letting an attacker forge response headers or inject a second response. This issue is fixed in version 0.50.0.

Referencias oficiales

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