CVE-2025-61729: Excessive resource consumption when printing error string for host certificate validation in crypto/x509
Go standard library · crypto/x509
Vendor fix available · Affected: Go standard library crypto/x509 · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 42% of scored CVEs
DescriptionCVE.org
Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Go standard library · crypto/x509before 1.24.11; from 1.25.0 before 1.25.5
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Go standard library
- Published
- December 2025
CoverageNo articles yet
No CyberSIXT article names CVE-2025-61729 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.