CVE-2026-66337
🔶 mediumSummary
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.
CVSS Score
6.5
Medium
EPSS Score
0.2
Exploit Probability
Published Date
2026-07-24
First Seen: 2026-07-31
📊 Relative Risk Intelligence
This CVE is Lower Risk - more severe than 47.4% of all 340,405 vulnerabilities in our database.
#179,012
Below average severity
Severity Percentile
🎯 CISA SSVC Assessment Updated: Jul 27, 2026
🔍 Exploitation Status
None
No known exploits
⚙️ Automatable
YES
Can be exploited automatically
💥 Technical Impact
Partial
Limited system impact
🏆 Discovered By
Upstream acknowledges cavid as the original reporter.
SSVC data provided by
CISA
Last Modified
2026-07-27
Source
NVD 🔗
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
CWE IDs (Weakness Types)