Answer in brief
CVE-2025-61729 records a High severity (CVSS 7.5) vulnerability in Excessive resource consumption when printing error string for host certificate validation in crypto/x509. The current sources do not mark it as known exploited. The current feed maps stdlib (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps stdlib (go). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:golang:go:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| stdlibgo | >=0 <1.24.11 >=1.25.0 <1.25.5 | 1.24.11, 1.25.5 |
Published upstream
Dec 2, 2025
Evidence: source:nvd:source_dates:source-dates:recordSource modified
Nov 14, 2026
Evidence: source:nvd:source_dates:source-dates:recordFirst seen by HOL
Aug 14, 2026
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.
Quoted source text, attributed separately from HOL analysis.