Java deserialization in Chainsaw
Priority MEDIUM 56CWE-502Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-502.
Summary
A deserialization flaw was found in Apache Chainsaw versions prior to 2.1.0 which could lead to malicious code execution.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.04612 91st percentileScored 2026-11-07
Fix Fixed Apache Chainsaw (Apache Software Foundation): 2.1.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Chainsaw | Apache Chainsaw to before 2.1.0 | 2.1.0 | Patch available | CNA |
- Apache Chainsaw VendorApache Affected Apache Chainsaw to before 2.1.0 Fixed in 2.1.0 Patch available CNA
Remediation
- Fix · CNA Apache Chainsaw (Apache Software Foundation) Fixed in 2.1.0
Timeline
- 2026-10-02 Threatist record created from CVE-2020-9493
- 2026-10-03 Alias added: GHSA-prp9-9gxw-38j8
- 2026-10-07 CVSS score added · CISA ADP
- 2026-10-07 Weakness changed · CISA ADP
- 2026-10-07 CISA SSVC decision points changed
References
Advisory 2
More Apache Chainsaw vulnerabilities
- TI-2022-07429 A deserialization flaw in the Chainsaw component of Log4j 1 can lead to malicious code execution. CVSS 3.1HIGH 8.8
Sources
- CVE-2020-9493 · CVE Program
- CVE-2020-9493 · NVD
- FIRST EPSS
- GHSA-prp9-9gxw-38j8 · GitHub Advisory Database · CC BY 4.0
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