How severe is CVE-2026-34544?

CVE-2026-34544 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-34544 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34544?

CVE-2026-34544 affects Openexr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34544?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34544 have an EU (EUVD) identifier?

Yes. CVE-2026-34544 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18060.

When was CVE-2026-34544 published?

CVE-2026-34544 was published on 2026-04-01 and last updated on 2026-06-17.

CVE-2026-34544

CVE-2026-34544 is a high-severity vulnerability in Openexr with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v4: 8.4
EPSS exploit prediction: 0% (15th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-18060
Weakness: CWE-190
Affected product: Openexr
Published: 2026-04-01
Last modified: 2026-06-17

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, 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.

Frequently asked questions

What is 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.
How severe is CVE-2026-34544?: CVE-2026-34544 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-34544 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (15th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34544?: CVE-2026-34544 affects Openexr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34544?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34544 have an EU (EUVD) identifier?: Yes. CVE-2026-34544 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-18060.
When was CVE-2026-34544 published?: CVE-2026-34544 was published on 2026-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openexr:openexr:*:*:*:*:*:*:*:*

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