CVE-2026-59983Public exploit

Decoder crash via wrapped sample-table size

Published Aug 25, 2026 · Updated Aug 25, 2026

Out-of-bounds read in OpenEXR on affected ILP32 builds allows attackers to crash image decoders via a crafted deep-tile EXR file. OpenEXRCore computes the sample-count workspace in 32-bit size_t, which wraps before unpack_sample_table iterates over the full tile dimensions. The affected ranges are before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13; processing attacker-controlled input is required.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in OpenEXR on affected ILP32 builds allows attackers to crash image decoders via a crafted deep-tile EXR file. OpenEXRCore computes the sample-count workspace in 32-bit size_t, which wraps before unpack_sample_table iterates over the full tile dimensions. The affected ranges are before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13; processing attacker-controlled input is required.

The record

CVE
CVE-2026-59983
Published
Aug 25, 2026
Updated
Aug 25, 2026
Vendor
Academy Software Foundation
Product
OpenEXR
Classifications
CWE-125, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.2.11
  2. Affected versionversion=>= 3.3.0, < 3.3.13
  3. Affected versionversion=>= 3.4.0, < 3.4.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Academy Software Foundation · OpenEXRversion=< 3.2.11; version=>= 3.3.0, < 3.3.13; version=>= 3.4.0, < 3.4.14

Published CVSS scores

5.5GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1204.002Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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