Heap-based Buffer Overflow Affecting openexr package, versions [3.4.2,3.4.7)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-CONAN-OPENEXR-15917003
- published6 Apr 2026
- disclosed1 Apr 2026
- creditNico
Introduced: 1 Apr 2026
NewCVE-2026-34545 (opens in a new tab)How to fix?
Upgrade openexr to version 3.4.7 or higher.
Overview
Affected versions of this package are vulnerable to Heap-based Buffer Overflow via the HTJ2K decoder. An attacker can execute arbitrary code or cause a denial of service by providing a crafted .exr file with HTJ2K compression and a channel width of 32768, which results in controlled data being written beyond the output heap buffer during image decoding.