crowdsecurity crowdsec up to 1.7.7 Request pkg/appsec/request.go NewParsedRequestFromRequest ContentLength allocation of resources

Summaryinfo

A vulnerability classified as very critical has been found in crowdsecurity crowdsec up to 1.7.7. Impacted is the function NewParsedRequestFromRequest of the file pkg/appsec/request.go of the component Request. The manipulation of the argument ContentLength leads to allocation of resources. This vulnerability is uniquely identified as CVE-2026-44982. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in crowdsecurity crowdsec up to 1.7.7. It has been rated as very critical. This issue affects the function NewParsedRequestFromRequest of the file pkg/appsec/request.go of the component Request. The manipulation of the argument ContentLength with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

CrowdSec offers crowdsourced protection against malicious IPs. From 1.5.0 until 1.7.8, pkg/appsec/request.go NewParsedRequestFromRequest allocated a request body buffer from max(r.ContentLength, 0), so HTTP/1.1 requests using Transfer-Encoding: chunked and HTTP/2 requests without a content-length header produced an empty body and caused WAF rules targeting REQUEST_BODY, BODY_ARGS, ARGS_POST, JSON, or XML to be skipped. This issue is fixed in version 1.7.8.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-44982 since 05/08/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/16/2026). MITRE ATT&CK project uses the attack technique T1499 for this issue.

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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