CVE-2026-61813
ModSecurity: Incorrect libcurl TLS hostname verification setting in HttpsClient::download
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
Description
ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Prior to 2.9.15 and 3.0.17, the HttpsClient::download function in src/utils/https_client.cc sets libcurl CURLOPT_SSL_VERIFYHOST to 1 instead of the strict value 2L. Under adversary-in-the-middle and TLS interception conditions, this non-strict setting may weaken TLS peer identity validation and increase the risk of accepting a certificate for an unintended host. End-to-end exploitation is non-trivial in typical environments. This issue is fixed in versions 2.9.15 and 3.0.17.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Low3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| NVDNVD · Received | 3.1 | Low3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.15% · top 95% of all CVEs (6 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.7.
Weakness
Affected products
owasp-modsecurity · ModSecurity
- affected < 2.9.15
- affected >= 3.0.0, < 3.0.17
References (5)
- https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-2vqc-36qp-ccmw (opens in a new tab)x_refsource_CONFIRM
- https://github.com/owasp-modsecurity/ModSecurity/commit/cce204806430e4848327aadeb9113e654631a0c1 (opens in a new tab)x_refsource_MISC
- https://github.com/owasp-modsecurity/ModSecurity/commit/edca70d853bfb725325137fa40d178beebc324fc (opens in a new tab)x_refsource_MISC
- https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v2.9.15 (opens in a new tab)x_refsource_MISC
- https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.17 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-61813)Record last updated .