Answer in brief
CVE-2026-40986 records a Medium severity (CVSS 4.8) vulnerability in Spring Web Flow JS RemotingHandler renders non-HTML Response as HTML. The current sources do not mark it as known exploited. The current feed maps Spring/Spring Web Flow (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 4.8. 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 Web Flow (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Spring/Spring Web Flowgeneric | >=4.0.0 <4.0.0.1 || >=3.0.0 <3.0.1.1 || >=2.5.0 <2.5.2 | 4.0.0.1, 3.0.1.1, 2.5.2 |
Published upstream
Jun 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 23, 2026
Spring Web Flow's JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not "text/html", which can result in a scripting attack in the user's browser if the error response from the server contains error details with input reflected from an attacker. Affected versions: Spring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-40986 records a Medium severity (CVSS 4.8) vulnerability in Spring Web Flow JS RemotingHandler renders non-HTML Response as HTML. The current sources do not mark it as known exploited. The current feed maps Spring/Spring Web Flow (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 4.8. 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 Web Flow (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Spring/Spring Web Flowgeneric | >=4.0.0 <4.0.0.1 || >=3.0.0 <3.0.1.1 || >=2.5.0 <2.5.2 | 4.0.0.1, 3.0.1.1, 2.5.2 |
Published upstream
Jun 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 23, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 23, 2026
Spring Web Flow's JavaScript RemotingHandler renders the body of an error response as HTML even when the response is not "text/html", which can result in a scripting attack in the user's browser if the error response from the server contains error details with input reflected from an attacker. Affected versions: Spring Web Flow 4.0.0; 3.0.0 through 3.0.1; 2.5.0 through 2.5.1.
Quoted source text, attributed separately from HOL analysis.