Technology · OWASP
OWASP Modsecurity vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 3 vulnerabilities in OWASP Modsecurity: 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-52761, was published on 10 July 2026.
- Last 7 days
- 0
- Last 90 days
- 2
- Critical, all time
- 0
- Exploited in the wild
- 0
About OWASP Modsecurity
An open-source, cross-platform web application firewall (WAF) engine for Apache, IIS and Nginx.
Latest OWASP Modsecurity vulnerabilities
- CVE-2026-52761: OWASP ModSecurity WAF rule bypass in utf8toUnicode transformationmediumCVSS 5.8
- CVE-2026-52747: OWASP ModSecurity WAF bypass via line break stripping in multipart parserhighCVSS 8.6
- CVE-2026-30923: OWASP libModSecurity3 denial of service in t:hexDecode transformationhighCVSS 7.5EPSS 0.4%
Most severe OWASP Modsecurity vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-52747: OWASP ModSecurity WAF bypass via line break stripping in multipart parserhighCVSS 8.6
- CVE-2026-30923: OWASP libModSecurity3 denial of service in t:hexDecode transformationhighCVSS 7.5EPSS 0.4%
- CVE-2026-52761: OWASP ModSecurity WAF rule bypass in utf8toUnicode transformationmediumCVSS 5.8
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 29 Jun 2026 | 0 | 0 | |
| 6 Jul 2026 | 2 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/modsecurity.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "OWASP Modsecurity vulnerabilities", https://junglewise.ai/threats/technologies/modsecurity, 26 September 2026.