ALPINE-CVE-2026-42055
- Source
- https://security.alpinelinux.org/vuln/CVE-2026-42055
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2026-42055.json
- JSON Data
- https://api.osv.dev/v1/vulns/ALPINE-CVE-2026-42055
- Upstream
- Published
- 2026-06-17T15:16:50.353Z
- Modified
- 2026-06-22T14:30:04.802810928Z
- Severity
-
- 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- [none]
- Details
-
NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttpproxyv2module and ngxhttpgrpcmodule modules. This vulnerability exists when the proxyhttpversion to 2 or grpcpass directives are used to proxy HTTP/2 traffic, the ignoreinvalidheaders directive is set to off, and the largeclientheader_buffers directive size is larger than 2 megabytes. A remote, unauthenticated attacker, along with conditions beyond their control, could send large headers while creating an upstream request. This may cause a heap-based buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
- References
Affected packages
Alpine:v3.22 / nginx
Package
- Name
- nginx
- Purl
- pkg:apk/alpine/nginx?arch=source
Alpine:v3.23 / nginx
Package
- Name
- nginx
- Purl
- pkg:apk/alpine/nginx?arch=source