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CVE-2026-44982— CrowdSec AppSec silently drops request body for chunked / HTTP-2 requests

Quick assessment

Affected
crowdsecurity crowdsec
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

crowdsec CrowdSec是crowdsec团队开源的一款协作式安全防护引擎，提供众包服务器检测和恶意 IP 防护。 CrowdSec 1.5.0版本至1.7.8之前版本存在处理逻辑错误漏洞，该漏洞源于请求体缓冲区分配不当，导致使用分块传输编码的HTTP/1.1请求和没有内容长度标头的HTTP/2请求产生空体，从而使得针对REQUEST_BODY、BODY_ARGS、ARGS_POST、JSON或XML的WAF规则被跳过。

CVSS 7.2 · High EPSS 0.37% · P30

Possible ATT&CK Techniques 1 AI

T1562.001

Affected Version Matrix 1

VendorProduct Version RangeStatus
crowdsecurity crowdsec >= 1.5.0, < 1.7.8 affected
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I. Basic Information for CVE-2026-44982

Vulnerability Information
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Vulnerability Title
CrowdSec AppSec silently drops request body for chunked / HTTP-2 requests
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
保护机制失效
Source: CVE Program / CVE List V5
Vulnerability Title
CrowdSec 处理逻辑错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
crowdsec CrowdSec是crowdsec团队开源的一款协作式安全防护引擎，提供众包服务器检测和恶意 IP 防护。 CrowdSec 1.5.0版本至1.7.8之前版本存在处理逻辑错误漏洞，该漏洞源于请求体缓冲区分配不当，导致使用分块传输编码的HTTP/1.1请求和没有内容长度标头的HTTP/2请求产生空体，从而使得针对REQUEST_BODY、BODY_ARGS、ARGS_POST、JSON或XML的WAF规则被跳过。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
crowdsecurity crowdsec >= 1.5.0, < 1.7.8 -

II. Public POCs for CVE-2026-44982

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7445 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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III. Intelligence Information for CVE-2026-44982

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Patches & Fixes for CVE-2026-44982 (1)

Vendor Advisories for CVE-2026-44982 (1)

Vendor Pages for CVE-2026-44982 (1)

IV. Related Vulnerabilities

Same product: crowdsec
Same vendor: crowdsecurity
Same weakness: CWE-693

V. Comments for CVE-2026-44982

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