CVE-2026-44981

HIGH8.2

CrowdSec LAPI: Denial of Service via Unbounded Gzip Decompression

Published Jul 16, 2026

Modified 2 months ago

Details

CrowdSec offers crowdsourced protection against malicious IPs. From 1.7.0 until 1.7.8, the LAPI router used gin-contrib/gzip with DefaultDecompressHandle globally in pkg/apiserver/controllers/controller.go, causing /v1/watchers and /v1/watchers/login to decompress unauthenticated gzip-compressed JSON request bodies without enforcing a maximum decompressed size and allowing excessive heap allocation that can make LAPI unreachable. This issue is fixed in version 1.7.8.

References

WEB

https://github.com/crowdsecurity/crowdsec/commit/54a0dfe6c16b7687b0da6634e0b19ef0f5d9bb30

WEB

https://github.com/crowdsecurity/crowdsec/commit/56d0d6915f7f25941dc5b4f484028646f6601a37

WEB

https://github.com/crowdsecurity/crowdsec/security/advisories/GHSA-273h-gvwr-c3qj

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-44981

CVSS Analysis

CVSS v4.0

8.2