Answer in brief
CVE-2026-34588 records a High severity (CVSS 7.8) vulnerability in OpenEXR has a signed 32-bit Overflow in PIZ Decoder Leads to OOB Read/Write. The current sources do not mark it as known exploited. The current feed maps AcademySoftwareFoundation/openexr (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-2026-34588 records a High severity (CVSS 7.8) vulnerability in OpenEXR has a signed 32-bit Overflow in PIZ Decoder Leads to OOB Read/Write. The current sources do not mark it as known exploited. The current feed maps AcademySoftwareFoundation/openexr (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 7.8. 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 AcademySoftwareFoundation/openexr (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| AcademySoftwareFoundation/openexrgeneric | >= 3.1.0, <= 3.1.13 || >= 3.2.0, < 3.2.7 || >= 3.3.0, < 3.3.9 || >= 3.4.0, < 3.4.9 | Not reported |
Published upstream
Apr 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 15, 2026
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. 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 AcademySoftwareFoundation/openexr (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| AcademySoftwareFoundation/openexrgeneric | >= 3.1.0, <= 3.1.13 || >= 3.2.0, < 3.2.7 || >= 3.3.0, < 3.3.9 || >= 3.4.0, < 3.4.9 | Not reported |
Published upstream
Apr 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jul 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 15, 2026
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.1.0 to before 3.2.7, 3.3.9, and 3.4.9, internal_exr_undo_piz() advances the working wavelet pointer with signed 32-bit arithmetic. Because nx, ny, and wcount are int, a crafted EXR file can make this product overflow and wrap. The next channel then decodes from an incorrect address. The wavelet decode path operates in place, so this yields both out-of-bounds reads and out-of-bounds writes. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.
Quoted source text, attributed separately from HOL analysis.