Immediate
Before a patch is released, reduce exposure immediately and only allow trusted sources to reach the affected service.
root@hackertop:~/vulnfeed/CVE-2026-42217#
CVE-2026-42217
MEDIUM
Path Traversal
⚠ Unpatched · Zero-day◉ PoC 公开
Lifecycle 4/7
AcademySoftwareFoundation OpenEXR up to 3.2.8/3.3.10/3.4.10 EXR File readVariableLengthInteger integer overflow
LIFECYCLE
6.0
CVSS
Vulnerability Description
A vulnerability has been found in AcademySoftwareFoundation OpenEXR up to 3.2.8/3.3.10/3.4.10 and classified as critical. This vulnerability affects the function readVariableLengthInteger of the component EXR File Handler. Upgrading to version 3.2.9, 3.3.11 or 3.4.11 eliminates this vulnerability. Applying the patch 21eaa33bcbbb0c83a5fc42f6b6d65b70a996e63c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.
Root Cause Analysis
The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control.
Impact: As an impact it is known to affect confidentiality, integrity, and availability.
Countermeasure: Upgrading to version 3.2.9, 3.3.11 or 3.4.11 eliminates this vulnerability. Applying the patch 21eaa33bcbbb0c83a5fc42f6b6d65b70a996e63c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.
Impact: As an impact it is known to affect confidentiality, integrity, and availability.
Countermeasure: Upgrading to version 3.2.9, 3.3.11 or 3.4.11 eliminates this vulnerability. Applying the patch 21eaa33bcbbb0c83a5fc42f6b6d65b70a996e63c is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.
Validation (PoC/EXP) - Looking for Contributors
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Mitigation Plan - Sorted by Priority
High
Enable extra access controls, WAF/ACL, or reverse-proxy rules for OpenEXR.
High
Use logs and IOCs to hunt through production traffic and confirm whether exploitation traces already exist.
Medium
Keep this issue on the watch list and follow vendor advisories, rollback notices, and new variants.
Vulnerability Lifecycle - Click each stage to inspect details
The issue has entered HackerTop VulnFeed and is now being tracked by the community.
The vulnerability has been synchronized into the platform and entered the visible triage flow.
Initial impact validation is complete based on current disclosure, technical details, and public intelligence.
A public proof path already exists for reference.
No in-the-wild exploitation has been confirmed yet, but monitoring should continue.
No vendor patch is available yet. Apply temporary mitigations first.
Reduce exposure, restrict access, and inspect logs until a permanent fix is available.
6.0
CVSS
Temp Score
6.0
MEDIUM
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Metric Details
Attack Vector
Attack Vector
Network
Attack Complexity
Attack Complexity
Low
Privileges Required
Privileges Required
None
User Interaction
User Interaction
None
Confidentiality Impact
Confidentiality Impact
High
Integrity Impact
Integrity Impact
High
Availability Impact
Availability Impact
High
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CVE-2026-42217 · CVSS 6.0 · Active Threat
