CVE-2026-44982Network attack vector

Unauthenticated WAF bypass via empty body parsing

Published Jul 16, 2026 · Updated Jul 16, 2026

Protection mechanism failure in CrowdSec AppSec 1.5.0 through 1.7.7 allows remote attackers to bypass body-scanning WAF rules. NewParsedRequestFromRequest allocates its body buffer from max(ContentLength, 0), replacing chunked HTTP/1.1 or lengthless HTTP/2 bodies with empty data before Coraza evaluation. No authentication is required; body-based rules are skipped and malicious payloads can reach the protected application, while URI- and header-only rules remain effective.

CVSS severity7.2
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection mechanism failure in CrowdSec AppSec 1.5.0 through 1.7.7 allows remote attackers to bypass body-scanning WAF rules. NewParsedRequestFromRequest allocates its body buffer from max(ContentLength, 0), replacing chunked HTTP/1.1 or lengthless HTTP/2 bodies with empty data before Coraza evaluation. No authentication is required; body-based rules are skipped and malicious payloads can reach the protected application, while URI- and header-only rules remain effective.

The record

CVE
CVE-2026-44982
Published
Jul 16, 2026
Updated
Jul 16, 2026
Vendor
CrowdSec
Product
CrowdSec
Classifications
CWE-693, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.5.0, < 1.7.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CrowdSec · CrowdSecversion=>= 1.5.0, < 1.7.8

Published CVSS scores

7.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-693Protection Mechanism Failure
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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