Answer in brief
CVE-2026-1502 records a Medium severity (CVSS 5.7) vulnerability in HTTP client proxy tunnel headers not validated for CR/LF. The current sources do not mark it as known exploited. The current feed maps Python Software Foundation/CPython (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-2026-1502 records a Medium severity (CVSS 5.7) vulnerability in HTTP client proxy tunnel headers not validated for CR/LF. The current sources do not mark it as known exploited. The current feed maps Python Software Foundation/CPython (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 5.7. 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 Python Software Foundation/CPython (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Python Software Foundation/CPythongeneric | >=0 <3.13.14 || >=3.14.0a1 <3.14.5rc1 || >=3.15.0a1 <3.15.0b1 | 3.13.14, 3.14.5rc1, 3.15.0b1 |
Published upstream
Apr 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 30, 2026
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
Quoted source text, attributed separately from HOL analysis.
CVSS is 5.7. 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 Python Software Foundation/CPython (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Python Software Foundation/CPythongeneric | >=0 <3.13.14 || >=3.14.0a1 <3.14.5rc1 || >=3.15.0a1 <3.15.0b1 | 3.13.14, 3.14.5rc1, 3.15.0b1 |
Published upstream
Apr 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 30, 2026
CR/LF bytes were not rejected by HTTP client proxy tunnel headers or host.
Quoted source text, attributed separately from HOL analysis.