Loading vulnerability…
CVE-2025-61729 is a denial-of-service vulnerability in Go's crypto/x509 package. The flaw is in HostnameError.Error(), which constructs hostname validation error messages without limiting the number of hostnames included and does so through repeated string concatenation. This results in quadratic runtime behavior during error-string construction. A maliciously crafted certificate can therefore trigger excessive CPU and memory consumption when certificate hostname verification fails and the error message is generated. The issue is associated with certificate verification paths including Certificate.Verify and Certificate.VerifyHostname and affects Go versions before 1.24.11 and 1.25.x before 1.25.5.
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
169 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A denial-of-service vulnerability in Go's crypto/x509 certificate handling that can cause excessive resource consumption via a crafted certificate.
A Go crypto/x509 denial-of-service vulnerability caused by excessive resource consumption when processing a crafted certificate.
A crypto/x509 excessive resource consumption vulnerability when printing error strings for host certificate validation.
A Go crypto/x509 denial-of-service vulnerability caused by excessive resource consumption when processing a crafted certificate.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.