CVE-2026-27135 is a denial-of-service vulnerability affecting nghttp2 library versions prior to 1.68.1. The flaw occurs when the library fails to properly validate internal states after a session termination, allowing a malformed frame to trigger an assertion failure and crash the application. This vulnerability carries a CVSS v3.1 score of 7.5 (HIGH), indicating it can be exploited remotely without authentication or user interaction to cause a complete denial of service. While it impacts availability, there is no known impact on confidentiality or integrity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage regarding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.68.1CPE matchmatch criteria | cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.