CVE-2026-29035
CVE-2026-29035: 1 tracked advisory record across Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityHigh7.5
High [CVE-2026-29035] Arbitrary code execution via crafted WebSocket frames
CVE-2026-29035Source published Source updated
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. A flaw was found in CivetWeb. This could lead to memory corruption, potentially resulting in denial of service or arbitrary code execution. The vulnerability occurs during the `permessage-deflate` decompression…
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- Affected-version details not available in this record.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- To mitigate this vulnerability, ensure that CivetWeb is compiled without the `USE_ZLIB` and `MG_EXPERIMENTAL_INTERFACES` flags enabled. If CivetWeb is deployed as a library, applications linking against it should avoid enabling these experimental WebSocket features. Disabling these features prevents the vulnerable code path from being active.
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