CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw. Prior to Chainsaw V2.0 Chainsaw was a component of Apache Log4j 1.2.x where the same issue exists.
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Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-01-19. NVD baseline CVSS 8.8; sources differ by 1.0.
CVE-2020-9493 identified a deserialization issue that was present in Apache Chainsaw. Prior to Chainsaw V2.0 Chainsaw was a component of Apache Log4j 1.2.x where the same issue exists.
January 18, 2022
May 27, 2026
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.3.11 Security update
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.1.7 on RHEL 7 security update
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 6.4.24 security update
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 6.4.24 security update
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 6.4.24 security update
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.4 security update
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.4 security update
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.4 security update
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.
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| log4j:log4j | 1.1.3 ... 1.2.9 (14 versions) | — | — |
| org.zenframework.z8.dependencies.commons:log4j-1.2.17 | 2.0 | — | — |
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
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.
RHSA-2022:0289 — Important
RHSA-2022:0290 — Important
RHSA-2022:0291 — Important
RHSA-2022:0294 — Important
RHSA-2022:0430 — Important
RHSA-2022:0435 — Important
RHSA-2022:0436 — Important
RHSA-2022:0437 — Important
RHSA-2022:0438 — Important
RHSA-2022:0439 — Important
RHSA-2022:0442 — Important
RHSA-2022:0444 — Important
RHSA-2022:0446 — Important
RHSA-2022:0448 — Important
RHSA-2022:0449 — Important
Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.
See which npm, PyPI, Go, and Maven packages are affected by CVE-2022-23307
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maven:org.zenframework.z8.dependencies.commons:log4j-1.2.17
redhat · ubuntu
CWE-502