Answer in brief
CVE-2024-38475 records a High severity vulnerability in Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.. The current sources mark it as known exploited. The current feed maps Apache Software Foundation/Apache HTTP Server (generic), apache/http_server (generic), netapp/ontap_9 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2024-38475 records a High severity vulnerability in Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path.. The current sources mark it as known exploited. The current feed maps Apache Software Foundation/Apache HTTP Server (generic), apache/http_server (generic), netapp/ontap_9 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. 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 Apache Software Foundation/Apache HTTP Server (generic), apache/http_server (generic), netapp/ontap_9 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Apache Software Foundation/Apache HTTP Servergeneric | 2.4.0 | Not reported |
| apache/http_servergeneric | 2.4.0 | Not reported |
| netapp/ontap_9generic | >=0 <* | * |
Published upstream
Jul 1, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 3, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
May 1, 2025
Evidence: source:kev:kev:kev:recordImproper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. Known-exploitation status makes exposure review time-sensitive. 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 Apache Software Foundation/Apache HTTP Server (generic), apache/http_server (generic), netapp/ontap_9 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Apache Software Foundation/Apache HTTP Servergeneric | 2.4.0 | Not reported |
| apache/http_servergeneric | 2.4.0 | Not reported |
| netapp/ontap_9generic | >=0 <* | * |
Published upstream
Jul 1, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 3, 2025
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
May 24, 2026
Added to CISA KEV
May 1, 2025
Evidence: source:kev:kev:kev:recordImproper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained.
Quoted source text, attributed separately from HOL analysis.