Vulnerability details

CVE-2026-59147

EGOR Data::DisjointSet::Shared

Data::DisjointSet::Shared versions before 0.02 for Perl allow out-of-bounds reads and writes via an unvalidated parent index in dsu_find

CVSS 3.1

9.8Critical

Official description

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.

CVSS scores

Score	Version	Source	Vector
9.8Critical	3.1	CISA ADP / Vulnrichment (CISA-ADP)	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Affected products

Vendor	Product	Versions	Source
EGOR	Data::DisjointSet::Shared	v < 0.02	CVEProject cvelistV5 (CNA)

References and advisories

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Details

Published: 2026-07-21
Last updated: 2026-07-23
State: Published
Assigner (CNA): CPANSec

Exploit prediction (EPSS)

0.55%

Probability of exploitation in 30 days

46.3%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: Yes
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-787
Out-of-bounds Write
CWE-125
Out-of-bounds Read