CVE-2022-30522Public exploitNetwork attack vector

Worker crash via oversized mod_sed input

Published Jun 8, 2022 · Updated Aug 3, 2024

Denial of service in mod_sed in Apache HTTP Server 2.4.53 allows remote attackers to crash a worker via very large filtered input. The filter's buffer-manipulation logic attempts excessive memory allocations when processing input larger than 2 GB, causing the request-handling process to abort. Remote reachability requires mod_sed to be loaded and configured as an input filter for attacker-controlled request bodies; the bounded consequence is service interruption.

CVSS severity7.5
High
EPSS probability89.53%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in mod_sed in Apache HTTP Server 2.4.53 allows remote attackers to crash a worker via very large filtered input. The filter's buffer-manipulation logic attempts excessive memory allocations when processing input larger than 2 GB, causing the request-handling process to abort. Remote reachability requires mod_sed to be loaded and configured as an input filter for attacker-controlled request bodies; the bounded consequence is service interruption.

The record

CVE
CVE-2022-30522
Published
Jun 8, 2022
Updated
Aug 3, 2024
Vendor
The Apache Software Foundation
Product
Apache HTTP Server
Classifications
CWE-789, CWE-770, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 8, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 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=2.4.53

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache HTTP Serverversion=2.4.53

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

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-789Uncontrolled Memory Allocation
CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

Public exploit references

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Technologies

Your stack

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Your stack

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