Answer in brief
CVE-2026-42308 records a Medium severity (CVSS 5.5) vulnerability in Pillow has an integer overflow when processing fonts. The current sources do not mark it as known exploited. The current feed maps pillow (pip), pillow (pypi). 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 5.5. 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 pillow (pip), pillow (pypi). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| pillowpip | <12.2.0 | 12.2.0 |
| pillowpypi | >=0 <12.2.0 | 12.2.0 |
Published upstream
May 4, 2026
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Jun 11, 2026
If a font advances for each glyph by an exceeding large amount, when Pillow keeps track of the current position, it may lead to an integer overflow. This has been fixed.
Quoted source text, attributed separately from HOL analysis.