Answer in brief
CVE-2026-40991 records a Medium severity (CVSS 5.9) vulnerability in XML External Entity (XXE) injection when documenting untrusted XML content. The current sources do not mark it as known exploited. The current feed maps Spring/Spring REST Docs (generic). 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 5.9. 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 Spring/Spring REST Docs (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Spring/Spring REST Docsgeneric | >=4.0.0 <4.0.0.1 || >=3.0.0 <3.0.5.1 || >=2.0.0.RELEASE <2.0.9.RELEASE | 4.0.0.1, 3.0.5.1, 2.0.9.RELEASE |
Published upstream
Jun 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 27, 2026
When using spring-restdocs-webtestclient or spring-restdocs-restassured to document a remote API accessed over HTTP, an attacker who compromises the API or tricks the user into documenting a malicious API can perform an XXE injection attack when the documentation-generating tests are next executed. Affected versions: Spring REST Docs 4.0.0; 3.0.0 through 3.0.5; 2.0.0.RELEASE through 2.0.8.RELEASE.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-40991 records a Medium severity (CVSS 5.9) vulnerability in XML External Entity (XXE) injection when documenting untrusted XML content. The current sources do not mark it as known exploited. The current feed maps Spring/Spring REST Docs (generic). 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 5.9. 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 Spring/Spring REST Docs (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Spring/Spring REST Docsgeneric | >=4.0.0 <4.0.0.1 || >=3.0.0 <3.0.5.1 || >=2.0.0.RELEASE <2.0.9.RELEASE | 4.0.0.1, 3.0.5.1, 2.0.9.RELEASE |
Published upstream
Jun 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 27, 2026
When using spring-restdocs-webtestclient or spring-restdocs-restassured to document a remote API accessed over HTTP, an attacker who compromises the API or tricks the user into documenting a malicious API can perform an XXE injection attack when the documentation-generating tests are next executed. Affected versions: Spring REST Docs 4.0.0; 3.0.0 through 3.0.5; 2.0.0.RELEASE through 2.0.8.RELEASE.
Quoted source text, attributed separately from HOL analysis.