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CVE-2026-61813 concerns a weak libcurl TLS hostname-verification setting when fetching resources over HTTPS. The Debian modsecurity-apache package is identified as affected on Debian Linux 12.0, 13.0, and 14.0. Inadequate hostname verification can allow acceptance of a TLS certificate that does not authenticate the intended server hostname. The precise setting, vulnerable function, and affected package-version boundaries are not available.
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No public exploit code observed for this vulnerability.
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A weak libcurl TLS hostname verification setting during HTTPS fetching. The advisory assigns Medium severity and a CVSS v3.1 score of 4.8, indicating network attack access, high attack complexity, no required privileges or user interaction, and low confidentiality and integrity impacts. The listed httpd and mod_security packages in Amazon Linux 2 Core, Amazon Linux 2023, and Amazon Linux 2027 Preview are explicitly marked Not Affected.
A critical, network-reachable vulnerability tracked as CVE-2026-61813 affecting listed Debian Linux releases and the Debian modsecurity-apache package. The supplied CVSS v3 vector indicates low-complexity, unauthenticated exploitation with no user interaction and high confidentiality, integrity, and availability impact.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.