Secuno
ENNL
Book demo

CVE-2026-42217

Openexr integer overflow

9.8 CRITICALPublic exploitEPSS 0.66%
  1. Published7 May 2026

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, readVariableLengthInteger() decodes a variable-length integer from untrusted EXR input without bounding the shift count. After enough continuation bytes, the code executes a left shift by 70 on a 64-bit value, which is undefined behavior. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Openexr≥ 3.0.0 < 3.2.9 · ≥ 3.3.0 < 3.3.11 · ≥ 3.4.0 < 3.4.11

Remediation

Fixed in
Openexr≥ 3.2.9

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-9722910.0
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 19.2 before…
CVE-2026-195698.8
dynamic_object_create() in kernel/userspace/userspace.c computed the backing allocation…
CVE-2026-593469.3
VMware Workstation and Fusion contain an integer-overflow vulnerability. A malicious…
CVE-2026-1064179.6
Integer overflow in Media in Google Chrome prior to 155.0.8059.39 allowed a remote…
CVE-2026-1062399.6
Integer overflow in WebGL in Google Chrome on on Android prior to 155.0.8059.39 allowed…
CVE-2026-935468.8
Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an…

Frequently asked

Is CVE-2026-42217 being actively exploited?

CVE-2026-42217 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.66%.

How severe is CVE-2026-42217?

CVE-2026-42217 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.66% probability of exploitation.

Which products are affected by CVE-2026-42217?

Affected products include Openexr.

How do I fix CVE-2026-42217?

Upgrade affected software to a fixed version, for example Openexr 3.2.9 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-42217 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.