CVE-2025-61729 - CVE House
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Status published Unknown CVE-2025-61729

Excessive resource consumption when printing error string for host certificate validation in crypto/x509

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Philippe Antoine (Catena cyber)

References

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CVE-2025-61727
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Unknown 0

Affected Vendor

Go standard library

View all reports →

Affected Software

crypto/x509
Vulnerable Versions:
0, 1.25.0

Timeline

Official Publish: December 2nd, 2025
Last Modified: December 3rd, 2025
Added to House: July 22nd, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.