Signed to Unsigned Conversion Error The advisory has been revoked - it doesn't affect any version of package AcademySoftwareFoundation/openexr (opens in a new tab)
Threat Intelligence
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
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Test your applications- Snyk IDSNYK-UNMANAGED-ACADEMYSOFTWAREFOUNDATIONOPENEXR-15338340
- published24 Feb 2026
- disclosed24 Feb 2026
- creditJungWoo Park
Introduced: 24 Feb 2026
CVE-2026-26981 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
Amendment
This was deemed not a vulnerability.
Overview
Affected versions of this package are vulnerable to Signed to Unsigned Conversion Error via the istream_nonparallel_read function in ImfContextInit.cpp when parsing a malformed EXR file through a memory-mapped IStream. An attacker can cause a heap buffer overflow by supplying a specially crafted EXR file that triggers a signed integer underflow, leading to an excessive length being passed to memcpy.