CVE-2026-34543— OpenEXR: Heap information disclosure in PXR24 decompression via unchecked decompressed size (undo_pxr24_impl)
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I. Basic Information for CVE-2026-34543
Vulnerability Information
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Vulnerability Title
OpenEXR: Heap information disclosure in PXR24 decompression via unchecked decompressed size (undo_pxr24_impl)
Source: NVD (National Vulnerability Database)
Vulnerability Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.8, sensitive information from heap memory may be leaked through the decoded pixel data (information disclosure). This occurs under default settings; simply reading a malicious EXR file is sufficient to trigger the issue, without any user interaction. This issue has been patched in version 3.4.8.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
对未经初始化资源的使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenEXR 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenEXR是Academy Software Foundation开源的一种高动态范围图像（HDR）文件格式的开放标准。 OpenEXR 3.4.0至3.4.8之前版本存在安全漏洞，该漏洞源于堆内存中的敏感信息可能通过解码的像素数据泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| AcademySoftwareFoundation | openexr | >= 3.4.0, < 3.4.8 | - |
II. Public POCs for CVE-2026-34543
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- Release v3.4.8 · AcademySoftwareFoundation/openexr · GitHubx_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-34543
Same Patch Batch · AcademySoftwareFoundation · 2026-04-01 · 3 CVEs total
| CVE-2026-34544 | OpenEXR: integer overflow to OOB write in uncompress_b44_impl() | |
| CVE-2026-34545 | OpenEXR: integer overflow lead to OOB in HTJ2K decoder |
IV. Related Vulnerabilities
Same product: openexr
- CVE-2026-42217
OpenEXR: Shift exponent overflow in `readVariableLengthInteg - CVE-2026-42216
OpenEXR: Out-of-bounds read in `IDManifest::init()` during p - CVE-2026-41142
OpenEXR is Vulnerable to Integer overflow in ImageChannel::r - CVE-2026-40250
OpenEXR has integer overflow in DWA decoder outBufferEnd poi - CVE-2026-40244
OpenEXR has integer overflow in DWA setupChannelData planarU
Same vendor: AcademySoftwareFoundation
- CVE-2026-42217
OpenEXR: Shift exponent overflow in `readVariableLengthInteg - CVE-2026-42216
OpenEXR: Out-of-bounds read in `IDManifest::init()` during p - CVE-2026-41142
OpenEXR is Vulnerable to Integer overflow in ImageChannel::r - CVE-2026-7582
AcademySoftwareFoundation OpenImageIO DDS Image ddsinput.cpp - CVE-2026-40250
OpenEXR has integer overflow in DWA decoder outBufferEnd poi
Same weakness: CWE-908
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n8n has In-Process Memory Disclosure in its Task Runner - CVE-2025-12736
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OpenSSH 安全漏洞
V. Comments for CVE-2026-34543
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