Skip to content
Fencer Intel
high 7.1

CVE-2026-59186 json

OpenEXR: Heap out-of-bounds write in TiledRgbaInputFile via integer overflow on 32-bit (ILP32) builds

published 3mo ago modified 2mo ago also EUVD-2026-65584 , GHSA-f667-c4wm-c8gq

Unreviewed: the maintainers' own advisory

Published by the maintainers on their GitHub repository AcademySoftwareFoundation/openexr. GitHub has not reviewed it into the GitHub Advisory Database, so the affected packages and versions are the maintainers' word. Read the full advisory on GitHub.

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits
0
none known

Summary

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. In versions before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13, a crafted tiled EXR can trigger a heap out-of-bounds write on 32-bit/ILP32 builds when read through the public TiledRgbaInputFile RGBA API. The file uses a small 40x40 dataWindow but a 65537x65537 tile size. On ILP32, the Array2D<Rgba> tile-conversion buffer size calculation overflows, allocates a much smaller heap buffer, and tile decode writes past that allocation. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.

Patch / fix

  • openexr openexr 3.2.11, 3.3.13, 3.4.14
  • openexr Debian 13 3.2.12-1~deb13u1
  • openexr Debian 14 3.4.14-0.1

debian advisories DEBIAN-CVE-2026-59186

  • OpenEXR RHEL 8 2.2.0-12.el8_10.3
  • OpenEXR-libs RHEL 8 2.2.0-12.el8_10.3

red hat advisories RHSA-2026:82345

  • openexr SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 2.2.1-150000.3.55.1
  • openexr SLES for SAP applications 16.0, SLES 16.0 3.2.2-160000.10.1
  • openexr SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 2.1.0-6.51.1

suse advisories SUSE-SU-2026:4005-1SUSE-SU-2026:4003-1SUSE-SU-2026:23604-1

  • python-OpenEXR openSUSE Tumbleweed 3.4.16-1.1
  • openexr openSUSE Leap 16.0 3.2.2-160000.10.1
  • openexr openSUSE Tumbleweed 3.4.14-1.1

opensuse advisories openSUSE-SU-2026:12184-1openSUSE-SU-2026:21737-1openSUSE-SU-2026:11612-1

  • OpenEXR-libs AlmaLinux 8 2.2.0-12.el8_10.3

almalinux advisories ALSA-2026:82345

  • OpenEXR Rocky Linux 8 2.2.0-12.el8_10.3

rocky linux advisories RLSA-2026:82345

  • openexr Alpine 3.24 3.4.15-r0

alpine advisories ALPINE-CVE-2026-59186

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2026-59186 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-59186 updated cvss 7.1

OpenEXR: OpenEXR: Heap out-of-bounds write via crafted tiled EXR file

  • Red Hat Enterprise Linux AppStream (v. 8) OpenEXR 2.2.0-12.el8_10.3, OpenEXR-libs 2.2.0-12.el8_10.3 Red Hat Enterprise Linux CRB (v. 8) OpenEXR-devel 2.2.0-12.el8_10.3, OpenEXR-debuginfo 2.2.0-12.el8_10.3, OpenEXR-debugsource 2.2.0-12.el8_10.3, OpenEXR-libs-debuginfo 2.2.0-12.el8_10.3
    fixed: vendor fix RHSA-2026:82345
  • Red Hat Enterprise Linux 6 OpenEXR, OpenEXR-libs Red Hat Enterprise Linux 7 OpenEXR, OpenEXR-libs Red Hat Enterprise Linux 9 openexr, openexr-libs Red Hat Enterprise Linux 10 openexr
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2mo ago

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-11).

Exploits and checks

  • github.com https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-f667-c4wm-c8gq referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Inferred packages

No advisory lists a package for this vulnerability yet. The CVE names these as products and links their GitHub repository, and the package registry names the same repository, so they are probably the affected packages. Low confidence: the versions are the CVE’s own for the product, and a stack check reports the package as unchecked when there are none.

ecosystem package repository affected
pypi openexr academysoftwarefoundation/openexr no versions given

Affected products

  • AcademySoftwareFoundation openexr

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

The maintainers of AcademySoftwareFoundation/openexr published their own advisory on GitHub. Reviewed sources take precedence over it.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.