CVE-2022-4900

MEDIUMNVD 6.26.2—
EchelonGraph scoreMEDIUM confidence

Score 6.2 from GitHub Security Advisory published 2023-11-02. NVD baseline CVSS 6.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.2EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.2Exploit: None knownExposed: 0

A fix is available — apply it.

A vulnerability was found in PHP where setting the environment variable PHP_CLI_SERVER_WORKERS to a large value leads to a heap buffer overflow.

CVSS v3
6.2
EG Score
6.2(medium)
EG Risk
33(Track)
EG Risk 33/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity62% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

November 2, 2023

Last Modified

November 3, 2025

References (7)

Vendor Advisories for CVE-2022-4900(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuphp7.0-zip (7.0.33-0ubuntu0.16.04.16+esm9) @ xenial2026-05-24ubuntu
ubuntuphp8.2-zip (8.2.10-2ubuntu2.1) @ mantic2026-05-24ubuntu
redhatphp:8.0-8070020230118114629.ef3316622023-02-21redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
php7.47.4.21-1+deb11u1 ... 7.4.33-1+deb11u5 (9 versions)7.4.33-1+deb11u6—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 8× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 124 total refreshes for this CVE.

  1. 2026-08-09 13:44 UTCEPSS rescore
  2. 2026-08-09 13:44 UTCEPSS rescore
  3. 2026-08-08 16:34 UTCEPSS rescore
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  11. 2026-08-01 22:06 UTCOSV refresh
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  23. 2026-07-23 02:16 UTCEG score recompute
  24. 2026-07-22 23:03 UTCEG score recompute
  25. 2026-07-22 14:06 UTCEPSS rescore
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  1. 2026-07-22 14:06 UTCEPSS rescore
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  14. 2026-07-15 04:49 UTCOSV refresh
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  21. 2026-07-12 05:44 UTCEPSS rescore
  22. 2026-07-11 08:25 UTCEPSS rescore
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  24. 2026-07-09 19:08 UTCEPSS rescore
  25. 2026-07-06 16:25 UTCEPSS rescore
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  35. 2026-06-27 05:23 UTCOSV refresh
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  66. 2026-06-09 16:17 UTCOSV refresh
  67. 2026-06-08 14:15 UTCEPSS rescore
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  71. 2026-06-06 13:46 UTCEPSS rescore
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  73. 2026-06-05 22:46 UTCEPSS rescore
  74. 2026-06-05 22:46 UTCEPSS rescore
  75. 2026-06-05 06:09 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2022-4900?
CVE-2022-4900 is a medium vulnerability published on November 2, 2023. A vulnerability was found in PHP where setting the environment variable PHPCLISERVER_WORKERS to a large value leads to a heap buffer overflow.
When was CVE-2022-4900 disclosed?
CVE-2022-4900 was first published in the National Vulnerability Database on November 2, 2023, with the most recent update on November 3, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2022-4900 actively exploited?
CVE-2022-4900 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 70.6% of all scored CVEs.
What is the CVSS score of CVE-2022-4900?
CVE-2022-4900 has a CVSS v3 base score of 6.2 (NVD).
How do I remediate CVE-2022-4900?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2022-4900, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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