CVE-2026-66337
MEDIUMLibsoup: libsoup: heap buffer over-read via integer underflow in soup_filter_input_stream_read_until()
Title source: cnaDescription
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.
References (2)
Core 2
Core References
Vdb Entry, X_Refsource_Redhat vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-66337
Issue Tracking, X_Refsource_Redhat issue-tracking
x_refsource_redhat
RHBZ#2506949
https://bugzilla.redhat.com/show_bug.cgi?id=2506949
Scores
CVSS v3
6.5
EPSS
0.0023
EPSS Percentile
13.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-125
Status
published
Products (5)
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
Published
Jul 24, 2026
Tracked Since
Jul 25, 2026