DEBIAN-CVE-2026-55368
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-55368
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55368.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-55368
- Upstream
- Published
- 2026-11-04T22:18:06Z
- Modified
- 2026-11-05T10:01:17Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
h2o is an HTTP server with support for HTTP/1.x, HTTP/2 and HTTP/3. Prior to commit 48b7ae12107fd2b118e4641da49599e9aac8edd8, H2O's access-log formatter could write past its log-line buffer when an affected custom access-log format was configured. The allocation errors affected %{error}x, %q when the query string was empty, and numeric elements whose temporary terminating NUL reached the end of the buffer. A matching request could crash the server, while the effect of the one-byte NUL overwrite beyond a crash was not established. This vulnerability is fixed with commit 48b7ae12107fd2b118e4641da49599e9aac8edd8.
- References
Affected packages
Debian:12 / h2o
Package
- Name
- h2o
- Purl
- pkg:deb/debian/h2o?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected