CrowdSec AppSec silently drops request body for chunked / HTTP-2 requests
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-693.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| crowdsecurity | crowdsec | 1.5.0 to before 1.7.8 | 1.7.8 | Patch available | CNA |
| — | github.com/crowdsecurity/crowdsec (Go) | 1.5.0 to before 1.7.8 | 1.7.8 | Patch available | GHSA-rw47-hm26-6wr7 |
- crowdsec Vendorcrowdsecurity Affected 1.5.0 to before 1.7.8 Fixed in 1.7.8 Patch available CNA
- github.com/crowdsecurity/crowdsec (Go) Vendor— Affected 1.5.0 to before 1.7.8 Fixed in 1.7.8 Patch available GHSA-rw47-hm26-6wr7
Remediation
- Fix · CNA crowdsec (crowdsecurity) Fixed in 1.7.8
- Fix · GHSA-rw47-hm26-6wr7 github.com/crowdsecurity/crowdsec (Go) Fixed in 1.7.8 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44982
- 2026-10-03 Alias added: GHSA-rw47-hm26-6wr7
References
Other 6
- https://github.com/crowdsecurity/crowdsec/security/advisories/GHSA-rw47-hm26-6wr7
- https://github.com/crowdsecurity/crowdsec/pull/4355
- https://github.com/crowdsecurity/crowdsec/commit/3d5c4d9b127091e9063b9b5eb785372a599a4435
- https://github.com/crowdsecurity/crowdsec/commit/57a793548671e6bbd2cde5562fe87b856ec9c642
- https://github.com/crowdsecurity/crowdsec/releases/tag/v1.7.8
- https://github.com/crowdsecurity/crowdsec
More crowdsecurity vulnerabilities
- TI-2026-32841 CrowdSec LAPI: Denial of Service via Unbounded Gzip Decompression CVSS 4.0HIGH 8.2
Sources
- CVE-2026-44982 · CVE Program
- CVE-2026-44982 · NVD
- FIRST EPSS
- GHSA-rw47-hm26-6wr7 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences