Answer in brief
CVE-2026-7210 records a High severity (CVSS 7.5) vulnerability in The expat and elementtree parsers use insufficient entropy for XML hash-flooding protection. The current sources do not mark it as known exploited. The current feed maps Python Software Foundation/CPython (generic), 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 7.5. 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), Python Software Foundation/CPython (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:python:python:3.15.0:alpha1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:python:python:3.15.0:alpha2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:python:python:3.15.0:alpha3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:python:python:3.15.0:alpha4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:python:python:3.15.0:alpha5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:python:python:3.15.0:alpha6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:python:python:3.15.0:alpha7:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:python:python:3.15.0:alpha8:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:a:python:python:3.15.0:beta1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Python Software Foundation/CPythongeneric | >=0 <3.13.14 || >=3.14.0 <3.14.6 || >=3.15.0a1 <3.15.0b2 | 3.13.14, 3.14.6, 3.15.0b2 |
| Python Software Foundation/CPythongeneric | >=0 <3.11.16 || >=3.12.0 <3.12.14 || >=3.13.0 <3.13.14 || >=3.14.0 <3.14.6 || >=3.15.0a1 <3.15.0b2 | 3.11.16, 3.12.14, 3.13.14, 3.14.6, 3.15.0b2 |
Published upstream
May 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 14, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 12, 2026
`xml.parsers.expat` and `xml.etree.ElementTree` use insufficient entropy for Expat hash-flooding protection, which allows a crafted XML document to trigger hash flooding.\r\n\r\nFully mitigating this vulnerability requires both updating libexpat to 2.8.0 or later and applying this patch.
Quoted source text, attributed separately from HOL analysis.