CVE-2026-66337

MediumCVSS 6.5/10Last modified Nov 5, 2026

Description

A flaw was found in libsoup. An unsigned integer underflow in the soup_filter_input_stream_read_until() function causes a heap buffer over-read when parsing multipart HTTP responses. A malicious HTTP server can exploit this by sending a crafted multipart response, potentially causing the client application to crash or disclose sensitive heap memory.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Weakness enumeration

CWE-125

Affected software

Vendor	Product	Versions
Red Hat	Red Hat Enterprise Linux 10	—
Red Hat	Red Hat Enterprise Linux 6	—
Red Hat	Red Hat Enterprise Linux 7	—
Red Hat	Red Hat Enterprise Linux 8	—
Red Hat	Red Hat Enterprise Linux 9	—

References

https://access.redhat.com/security/cve/CVE-2026-66337Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2506949Exploit, Issue Tracking, Vendor Advisory

Timeline

Published: Jul 24, 2026
Last modified: Nov 5, 2026
NVD status: Analyzed

Related CVEs from 2026

CVE-2026-663387.2A flaw was found in libsoup. The chunked transfer encoding parser uses a permissive parsing function for chunk sizes that silently accepts i CVE-2026-663396.5A flaw was found in libsoup. After a CONNECT tunnel is established through an HTTP proxy, libsoup incorrectly attaches the Proxy-Authorizati CVE-2026-66346.3A weakness has been identified in usememos memos up to 0.22.1. This affects the function memos_access_token of the file src/App.tsx of the c CVE-2026-663405.3The Mira cloud authentication endpoints do not enforce per-account rate limiting, per-IP throttling, or account lockout after repeated faile CVE-2026-663445.4NetKids iMark, provided by Integrated Systems Technologies, Inc., contains an Uncontrolled Search Path Element vulnerability (CWE-427). An a CVE-2026-663496.5The MMS server connection handler contains a flaw in its processing of BER-encoded request data. When an MMS confirmed request PDU containi CVE-2026-66357.3A security vulnerability has been detected in rowboatlabs rowboat up to 0.1.67. This impacts the function tool_call of the file apps/experim CVE-2026-663535.3Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in woylie doggo allows Reflected XSS. Do CVE-2026-663578.3httpd has never implemented obs-fold (RFC 2616 §2.2 / RFC 7230 §3.2.4 header continuation lines). Every CRLF followed by a non-CRLF octet un CVE-2026-663585.1A cross-site scripting vulnerability exists in acmailer, which may allow an attacker to execute an arbitrary script.CVE-2026-66364.3A vulnerability was detected in p2r3 convert up to 6998584ace3e11db66dff0b423612a5cf91de75b. Affected is the function Bun.serve of the file CVE-2026-663607.5The ISO Presentation layer contains a flaw in the handling of specific parameters during normal mode negotiation. A missing length check in