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Vulnerabilities

Threat intelligence · CVE-2022-30556

Apache HTTP Server 2.4.53 and earlier may return lengths to applications calling r:wsread() that point past the end of the storage allocated for the buffer.

Published Jun 9, 2022 · catalog updated Jun 17, 2026 · http server

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2022-30556. EPSS is 5.41%. Act only if a listed version of http server is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
5.41%
Remediation
Version ranges on file
Affected products
cpe apache/http server · cpe fedoraproject/fedora · cpe netapp/clustered data ontap

Apache HTTP Server Multiple Vulnerabilities Multiple vulnerabilities have been identified in Apache HTTP Server {free and open-source cross-platform web server software}, leading to DoS, information disclosure, and HTTP request smuggling attacks. How it can be Exploited CVE-2022-26377: Apache HTTP Server is vulnerable to HTTP request smuggling attack because there is an inconsistent interpretation of HTTP Requests vu

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/http server< 2.4.54
  • cpe fedoraproject/fedora35
  • cpe fedoraproject/fedora36
  • cpe netapp/clustered data ontapversion unspecified

How to fix CVE-2022-30556

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2022-30556. EPSS is 5.41%. Act only if a listed version of http server is installed.

Which versions are affected?

Compare what you have installed with apache/http server < 2.4.54. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-200: Exposure of Sensitive Information. EPSS 5.41%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Apache HTTP Server security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jun 27, 2022 · AlienVault OTX

    Detected

    Apache HTTP Server Multiple Vulnerabilities Multiple vulnerabilities have been identified in Apache HTTP Server {free and open-source cross-platform web server software}, leading to DoS, information disclosure, and HTTP request smuggling attacks. How it can be Exploited CVE-2022-26377: Apache HTTP Server is vulnerable to HTTP request smuggling attack because there is an inconsistent interpretation

  2. Jun 17, 2026 · Monitored products — critical

    Updated

    Apache HTTP Server 2.4.53 and earlier may return lengths to applications calling r:wsread() that point past the end of the storage allocated for the buffer.

Sources

References

Freshness

Last verified in this catalog Nov 5, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • urlscan.ioNov 6, 2026
  • FIRST EPSSNov 5, 2026
  • CVE.orgNov 4, 2026
  • Monitored products — criticalNov 4, 2026
  • AlienVault OTXNov 2, 2026