{"id":"CVE-2026-52761","state":"PUBLISHED","title":"ModSecurity: Transformation utf8toUnicode produces wrong output on i386 architecture","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.","publishedAt":"2026-07-10T21:40:23.961Z","updatedAt":"2026-07-13T14:08:57.437Z","severity":{"score":5.8,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["owasp-modsecurity ModSecurity"],"affected":[{"vendor":"owasp-modsecurity","product":"ModSecurity","versions":[{"version":">= 3.0.0, < 3.0.16","status":"affected"}]}],"references":["https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qjgm-7gp4-f8qq","https://github.com/owasp-modsecurity/ModSecurity/commit/edcd010814e234d46e2ec55a0f1078ff9d3032e4","https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.16"],"weaknesses":["CWE-467"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52761.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52761","state":"PUBLISHED","datePublished":"2026-07-10T21:40:23.961Z","dateUpdated":"2026-07-13T14:08:57.437Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-08T17:13:43.063Z"},"containers":{"cna":{"title":"ModSecurity: Transformation utf8toUnicode produces wrong output on i386 architecture","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"owasp-modsecurity","product":"ModSecurity","versions":[{"version":">= 3.0.0, < 3.0.16","status":"affected"}]}],"references":[{"url":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qjgm-7gp4-f8qq","name":"https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qjgm-7gp4-f8qq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/owasp-modsecurity/ModSecurity/commit/edcd010814e234d46e2ec55a0f1078ff9d3032e4","name":"https://github.com/owasp-modsecurity/ModSecurity/commit/edcd010814e234d46e2ec55a0f1078ff9d3032e4","tags":["x_refsource_MISC"]},{"url":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.16","name":"https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.16","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-467","lang":"en","description":"CWE-467: Use of sizeof() on a Pointer Type","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-10T21:40:23.961Z"},"source":{"advisory":"GHSA-qjgm-7gp4-f8qq","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-13T14:08:45.655716Z","id":"CVE-2026-52761","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-13T14:08:57.437Z"}}]}}}