Answer in brief
CVE-2026-40973 records a High severity (CVSS 7.0) vulnerability in Spring Boot accepts predictable temp directory without ownership verification. The current sources do not mark it as known exploited. The current feed maps org.springframework.boot:spring-boot (maven), org.springframework.boot:spring-boot (maven), org.springframework.boot:spring-boot (maven), org.springframework.boot:spring-boot (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.springframework.boot:spring-boot (maven), org.springframework.boot:spring-boot (maven), org.springframework.boot:spring-boot (maven), org.springframework.boot:spring-boot (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.springframework.boot:spring-bootmaven | >=4.0.0 <4.0.6 | 4.0.6 |
| org.springframework.boot:spring-bootmaven | >=3.5.0 <3.5.14 | 3.5.14 |
| org.springframework.boot:spring-bootmaven | >=3.4.0 | Not reported |
| org.springframework.boot:spring-bootmaven | >=3.3.0 | Not reported |
| org.springframework.boot:spring-bootmaven | >=0 | Not reported |
Published upstream
Apr 28, 2026
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Sep 10, 2026
A local attacker on the same host as the application may be able to take control of the directory used by `ApplicationTemp`. When `server.servlet.session.persistent` is set to `true` and the attack persists across application restarts, this may allow the attacker to read session information and hijack authenticated users or deploy a gadget chain and execute code as the application's user. Affected: Spring Boot 4.0.0–4.0.5 (fix 4.0.6), 3.5.0–3.5.13 (fix 3.5.14), 3.4.0–3.4.15 (fix 3.4.16), 3.3.0–3.3.18 (fix 3.3.19), 2.7.0–2.7.32 (fix 2.7.33); predictable temp directory / `ApplicationTemp` ownership verification. Versions that are no longer supported are also affected per vendor advisory.
Quoted source text, attributed separately from HOL analysis.