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CVE-2026-52761

MEDIUM
5.8
CVSS 3.1
Description
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 through 3.0.15, the t:utf8toUnicode transformation in src/actions/transformations/utf8_to_unicode.cc produces wrong output on i386 architecture because snprintf uses sizeof on a char pointer rather than the length of the unicode buffer, allowing rules that use this transformation to be bypassed on i386 architecture. This issue is fixed in version 3.0.16.

Metadata

CVE ID
CVE-2026-52761
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-08 17:13 UTC
Published
2026-07-10 21:40 UTC
Last updated
2026-07-10 21:40 UTC
Primary CWE
CWE-467
CWE-467: Use of sizeof() on a Pointer Type
Vendor / Product
owasp-modsecurity / ModSecurity
Sources
cve.org  ·  NVD

Severity & Metrics

5.8 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
Affected products (1)
VendorProductPlatformVersions
owasp-modsecurity ModSecurity — >= 3.0.0, < 3.0.16
Weakness (CWE)
CWESourceDescription
CWE-467 cna CWE-467: Use of sizeof() on a Pointer Type
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.8 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N
References (3)
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