CVE-2022-23307A deserialization flaw in the Chainsaw component of Log4j 1 can lead to malicious code execution.
- 8.8HighCVSS base score
- 54.4%Exploitation in 30 daysEPSS · top 1.0% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By apache
- 1 day later
· 1 day later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 54.4% · top 1.0% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
Apache Software Foundation · Apache Log4j 1.x
- affected 1.2.1 – < unspecified
- affected unspecified – ≤ 2.0-alpha1
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenlog4j:log4jGHSA-f7vh-qwp3-x37m (opens in a new tab)
- Mavenorg.zenframework.z8.dependencies.commons:log4j-1.2.17GHSA-f7vh-qwp3-x37m (opens in a new tab)
What to do
Workaround: Upgrade to Apache Log4j 2 and Apache Chainsaw 2.1.0.
References
References4
- https://logging.apache.org/log4j/1.2/index.html (opens in a new tab)x_refsource_MISCx_transferred
- https://lists.apache.org/thread/rg4yyc89vs3dw6kpy3r92xop9loywyhh (opens in a new tab)x_refsource_MISCx_transferred
- https://www.oracle.com/security-alerts/cpuapr2022.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.oracle.com/security-alerts/cpujul2022.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-0575 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-f7vh-qwp3-x37m (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-23307)Record last updated .