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CVE-2026-53532— OpenEXR: Unhandled assert abort in HTJ2K decoder via crafted QCD marker (DoS)

Quick assessment

Affected
AcademySoftwareFoundation openexr
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenEXR 是 EXR 图像格式的参考实现和规范，在电影行业中被广泛使用。在 3.4.0 至 3.4.12 版本中，一个精心构造的 HTJ2K 压缩 EXR 文件会导致任何调用 处理不可信输入的应用程序发生无条件进程中止，从而导致拒绝服务（Denial of Service）。 该崩溃由一个 QCD 标记触发，其低五位为零。OpenEXR 在构造码流并评估其量化增量参数时，会将此标记直接传递给内置的 OpenJPH 库。然而，OpenJPH 使用断言（assertion）而非可恢复的错误来处理对这类位值的验证；

CVSS 7.1 · High

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-53532

Vulnerability Information
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Vulnerability Title
OpenEXR: Unhandled assert abort in HTJ2K decoder via crafted QCD marker (DoS)
Source: CVE Program / CVE List V5
Vulnerability Description
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions 3.4.0 through 3.4.12, a crafted HTJ2K-compressed EXR file causes an unconditional process abort in any application that calls exr_start_read() on untrusted input, resulting in denial of service. The crash is triggered by a QCD marker whose lower five bits are zero, which OpenEXR passes into the vendored OpenJPH library while constructing the codestream and evaluating its quantization delta parameters. OpenJPH uses an assertion rather than a recoverable error to validate those bits, so any invalid value calls abort() directly and cannot be intercepted by surrounding error handling, a problem compounded by OpenEXR wrapping only its internal HT header parser in error handling while leaving the later codestream read and construction calls unprotected. This issue has been resolved in version 3.4.13.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
可达断言
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AcademySoftwareFoundation openexr >= 3.4.0, < 3.4.13 -

II. Public POCs for CVE-2026-53532

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Qwen3.6-35B-A3B · 9611 chars
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III. Intelligence Information for CVE-2026-53532

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Patches & Fixes for CVE-2026-53532 (1)

Vendor Advisories for CVE-2026-53532 (1)

IV. Related Vulnerabilities

Same product: openexr
Same vendor: AcademySoftwareFoundation
Same weakness: CWE-617

V. Comments for CVE-2026-53532

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