CVE-2026-34544
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, a crafted B44 or B44A EXR file can cause an out-of-bounds write in any application that decodes it via exr_decoding_run(). Consequences range from immediate crash (most likely) to corruption of adjacent heap allocations (layout-dependent). This issue has been patched in version 3.4.8.
- CVSS 4.0
- 8.4
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 7.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H - EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 15% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-190, CWE-787
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openexr:openexr
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-h762-rhv3-h25v | PyPI | openexr | >=3.4.0 <3.4.8 | 3.4.8 |
| GHSA-h762-rhv3-h25v | PyPI | openexr | >=3.3.0 <=3.3.8 | no fix published |
| GHSA-h762-rhv3-h25v | PyPI | openexr | >=3.2.0 <=3.2.6 | no fix published |
| PYSEC-2026-2847 | PyPI | openexr | >=3.2.0 <3.4.8 | 3.4.8 |