CrowdSec AppSec silently drops request body for chunked / HTTP-2 requests

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Summary

CVECVE-2026-44982
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-16 20:16:45 UTC
Updated2026-07-17 16:17:14 UTC
DescriptionCrowdSec 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.

Risk And Classification

Primary CVSS: v3.1 7.2 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem Types: CWE-693 | CWE-693 CWE-693: Protection Mechanism Failure

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
3.1CNADECLARED7.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Crowdsecurity Crowdsec affected >= 1.5.0, < 1.7.8 Not specified

References

ReferenceSourceLinkTags
github.com/crowdsecurity/crowdsec/commit/57a793548671e6bbd2cde5562fe87b8... [email protected] github.com
github.com/crowdsecurity/crowdsec/releases/tag/v1.7.8 [email protected] github.com
github.com/crowdsecurity/crowdsec/pull/4355 [email protected] github.com
github.com/crowdsecurity/crowdsec/security/advisories/GHSA-rw47-hm26-6wr7 [email protected] github.com
github.com/crowdsecurity/crowdsec/commit/3d5c4d9b127091e9063b9b5eb785372... [email protected] github.com
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