Skip to main content
No exploitation reportedFix available

CVE-2022-30556

No exploitation reported by the sources we read.

  • Published2022-06-09
  • WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2022-06-0917:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-30556?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-30556?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV
Fedoraproject fedora
BranchAffectedFixed in
35.x= 35no fix published
36.x= 36no fix published
Apache HTTP Server
BranchAffectedFixed in
2.4< 2.4.542.4.54
Netapp clustered data ontap
BranchAffectedFixed in
—all versionsno fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • httpdAlmaLinux:9all versions · fixed in 2.4.53-7.el9and 8 other packages
  • httpdAlmaLinux:8all versions · fixed in 2.4.37-51.module_el8.7.0+3281+01e58653and 6 other packages
  • mod_http2AlmaLinux:8all versions · fixed in 1.15.7-5.module_el8.6.0+2872+fe0ff7aa
  • mod_http2AlmaLinux:8all versions · fixed in 1.15.7-5.module_el8.6.0+3031+fb177b09
  • mod_mdAlmaLinux:8all versions · fixed in 1:2.0.8-8.module_el8.6.0+2872+fe0ff7aa
  • mod_mdAlmaLinux:8all versions · fixed in 1:2.0.8-8.module_el8.6.0+3031+fb177b09
  • mod_sslAlmaLinux:9all versions · fixed in 1:2.4.53-7.el9and 1 other package
  • mod_sslAlmaLinux:8all versions · fixed in 1:2.4.37-51.module_el8.7.0+3281+01e58653and 1 other package

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-200read 2026-10-23
  • FIRST EPSSEPSS score5.3 %2026-10-22
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Published
2022-06-09
Last Modified
2026-06-17
NVD status
Analyzed

Frequently asked questions

What is 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.

Is CVE-2022-30556 actively exploited?

Active exploitation of CVE-2022-30556 has not been confirmed. Its EPSS score was 5.3% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2022-30556?

CVE-2022-30556 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

Running Apache HTTP Server? Hear about its next vulnerability

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this productCISA KEV additions, October 2026Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database