EUVD-2026-46368
GHSA-2q6p-wjf6-872r
Vulnerability Assessment
| Weakness |
CWE
ASVS 5.0
V15 - Secure Coding and Architecture Bounds checking, write limits
MITRE ATT&CK
2 techniques across 2 tactics: Execution, Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Jul 23, 2026
Out-of-bounds read and write in the Perl module Data::DisjointSet::Shared before version 0.02 lets a local actor who can write the shared backing file corrupt process memory or crash consumers of the disjoint-set structure. The dsu_find routine trusts a file-stored parent index that is never bounds-checked against the node count, so the next find or union operation dereferences and path-compresses through an out-of-bounds pointer. No public exploit is identified at time of analysis, and the EPSS score is very low (0.17%), consistent with a niche CPAN module rather than a broadly exploited target.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from Vendor (CPANSec) · only source for this CVE.
CVSS VectorVendor: CPANSec
Lifecycle Timeline
4DescriptionCVE.org
Data::DisjointSet::Shared versions before 0.02 for Perl allow out-of-bounds reads and writes via an unvalidated parent index in dsu_find.
The attach-time validator dsu_validate_header checks the header scalars and region layout against the file size, but does not validate the array contents it then trusts. dsu_find walks and path-compresses parent[x] with x a raw file-stored index never bounded against the node count, so both the read and the compression write-back land out of bounds.
A local peer that can write the backing file can leave the header valid while poisoning the parent array, so the next find or union both reads and writes through an out-of-bounds parent index, corrupting memory or crashing the process.
Executive ViewAI
Data::DisjointSet::Shared, a Perl CPAN module, contains a critical out-of-bounds memory access vulnerability (CVSS 9.8) with no public exploit identified at time of analysis. Local actors with backing file write access can corrupt process memory and crash consuming applications, creating potential data loss and availability risks for organizations dependent on this module.
Within 24 hours, conduct an inventory to identify all systems running Data::DisjointSet::Shared and assess criticality of affected applications. Within 7 days, upgrade all instances to version 0.02 or later and validate the patch in staging environments. Within 30 days, complete production rollout of patched versions and execute regression testing across all dependent services to confirm data integrity.
Apply vendor patch.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
Memory corruption occurs when a program writes data beyond the boundaries of allocated memory regions or accesses memory in unintended ways, violating the integrity of the process's address space.
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Exploit-DB