CVE-2025-58186: Lack of limit when parsing cookies can cause memory exhaustion in net/http
CSIRTS triage
- What
- Unbounded cookie parsing can cause memory exhaustion through large cookie payloads.
- Who is affected
- Go applications using net/http package without custom cookie limits.
- Urgency
- Medium priority; not exploited but enables trivial denial of service attacks.
- Action
- Apply Go standard library patch implementing cookie parsing limits or set MaxHeaderBytes appropriately.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-58186
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2025-581860.53% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 42% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2025-58186 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- high[UPDATE] [high] Golang Go: Multiple vulnerabilitiescert-bund
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