DEBIAN-CVE-2026-29035
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-29035
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-29035.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-29035
- Upstream
- Published
- 2026-08-11T21:17:35Z
- Modified
- 2026-09-14T17:03:02Z
- Severity
-
- 8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/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
-
CivetWeb (commit 4a4f0c95) contains a heap and stack buffer overflow vulnerability in the read_websocket() function that allows unauthenticated remote attackers to corrupt memory by sending compressed WebSocket frames when both USE_ZLIB and MG_EXPERIMENTAL_INTERFACES are defined. Attackers can negotiate permessage-deflate during the WebSocket handshake and send a crafted frame with the RSV1 bit set, causing the server to write a 4-byte zlib sync trailer out-of-bounds past the allocated buffer, leading to heap metadata corruption, denial of service, or potential code execution.
- References
Affected packages
Debian:12 / civetweb
Package
- Name
- civetweb
- Purl
- pkg:deb/debian/civetweb?arch=source&distro=bookworm
Debian:13 / civetweb
Package
- Name
- civetweb
- Purl
- pkg:deb/debian/civetweb?arch=source&distro=trixie
Debian:14 / civetweb
Package
- Name
- civetweb
- Purl
- pkg:deb/debian/civetweb?arch=source&distro=forky