Information disclosure in Spring Session
Priority LOW 30CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and GitHub. Impact type from CWE-200.
Summary
In Spring Session version 3.0.0, the session id can be logged to the standard output stream. This vulnerability exposes sensitive information to those who have access to the application logs and can be used for session hijacking. Specifically, an application is vulnerable if it is using HeaderHttpSessionIdResolver.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0066 51st percentileScored 2026-11-07
Fix Fixed org.springframework.session:spring-session-core (Maven): 3.0.1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
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 |
|---|---|---|---|---|---|
| — | Spring Session | Spring session versions 3.0.x prior to 3.0.1 | — | No fix listed | CNA |
| — | org.springframework.session:spring-session-core (Maven) | 3.0.0 to before 3.0.1 | 3.0.1 | Patch available | GHSA-r7qr-f43m-pxfr |
- Spring Session Vendor— Affected Spring session versions 3.0.x prior to 3.0.1 Fixed in — No fix listed CNA
- org.springframework.session:spring-session-core (Maven) Vendor— Affected 3.0.0 to before 3.0.1 Fixed in 3.0.1 Patch available GHSA-r7qr-f43m-pxfr
Remediation
- Fix · GHSA-r7qr-f43m-pxfr org.springframework.session:spring-session-core (Maven) Fixed in 3.0.1 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Data Grid 8
- Red Hat JBoss Data Grid 7
- Red Hat JBoss Enterprise Application Platform 7
- Red Hat JBoss Enterprise Application Platform Expansion Pack
- Red Hat OpenShift Dev Spaces
Timeline
- 2026-10-02 Threatist record created from CVE-2023-20866
- 2026-10-03 Alias added: GHSA-r7qr-f43m-pxfr
- 2026-10-07 EPSS moved to the 50th–90th percentile
References
Sources
- CVE-2023-20866 · CVE Program
- CVE-2023-20866 · NVD
- FIRST EPSS
- GHSA-r7qr-f43m-pxfr · GitHub Advisory Database · CC BY 4.0
- CVE-2023-20866 · Red Hat security data · CC BY 4.0
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