CVE-2026-27135
A remote, anonymous attacker can exploit a vulnerability in nghttp2 to carry out a denial of service attack.
CSIRTS triage
- What
- A vulnerability can be exploited by a remote attacker to carry out a denial of service attack.
- Who is affected
- Deployments of nghttp2 are affected by this vulnerability.
- Urgency
- Remediation is medium urgency due to the potential for denial-of-service attacks.
- Action
- Update to the latest version of nghttp2.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.78% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 51% of all EPSS-scored CVEs.
Advisory coverage (1)
- medium[UPDATE] [medium] nghttp2: Vulnerability allows denial of servicecert-bund · 2026-07-02
External references
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[](https://www.csirts.com/cve/CVE-2026-27135)