CVE-2024-23722Public exploitNetwork attack vector

Unauthenticated service crash via malformed form payload

Published Mar 26, 2024 · Updated Aug 6, 2024

NULL pointer dereference in Fluent Bit 2.1.8 through 2.2.1 allows remote attackers to crash the service with malformed form data. The HTTP input parser assumes an equals sign exists in an application/x-www-form-urlencoded body, then calls a function on an empty keys array. The HTTP input must be enabled and reachable; a successful request terminates the process without restart, interrupting log delivery.

CVSS severity7.5
High
EPSS probability0.94%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Fluent Bit 2.1.8 through 2.2.1 allows remote attackers to crash the service with malformed form data. The HTTP input parser assumes an equals sign exists in an application/x-www-form-urlencoded body, then calls a function on an empty keys array. The HTTP input must be enabled and reachable; a successful request terminates the process without restart, interrupting log delivery.

The record

CVE
CVE-2024-23722
Published
Mar 26, 2024
Updated
Aug 6, 2024
Vendor
Fluent Bit
Product
Fluent Bit
Classifications
CWE-476, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record 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=2.1.8 <=2.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fluent Bit · Fluent Bitversion=2.1.8 <=2.2.1

Published CVSS scores

7.5CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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