What is CVE-2026-29035?

CVE-2026-29035 is a medium-severity vulnerability in Civetweb, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-08-11.

How severe is CVE-2026-29035?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Buffer overflow in Civetweb

CVE-2026-29035

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 an…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.

Affected products

Civetweb — versions 0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-29035?: CVE-2026-29035 is a medium-severity vulnerability in Civetweb, classified under Out-of-bounds Write. CVSS score: 6.5/10. Published 2026-08-11.
How severe is CVE-2026-29035?: Medium severity. CVSS v3 base score is 6.5 out of 10.