crowdsecurity CrowdSec up to 1.7.7 API Server controller.go allocation of resources

Summaryinfo

A vulnerability described as critical has been identified in crowdsecurity CrowdSec up to 1.7.7. This issue affects some unknown processing of the file pkg/apiserver/controllers/controller.go of the component API Server. Executing a manipulation can lead to allocation of resources. This vulnerability is handled as CVE-2026-44981. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in crowdsecurity CrowdSec up to 1.7.7. It has been declared as critical. This vulnerability affects an unknown code block of the file pkg/apiserver/controllers/controller.go of the component API Server. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-44981 since 05/08/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 1.7.8 eliminates this vulnerability.

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Productinfo

Vendor

• crowdsecurity

Name

• CrowdSec

Version

• 1.7.0
• 1.7.1
• 1.7.2
• 1.7.3
• 1.7.4
• 1.7.5
• 1.7.6
• 1.7.7

Website

• Product: https://github.com/crowdsecurity/crowdsec/

CPE 2.3info

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