CVE-2026-77831

Inefficient Algorithmic Complexity vulnerability in ash-project ash_paper_trail allows a user who can submit a large array attribute to a paper-trailed create or update action to cause a denial of service through excessive CPU and memory use. With full-diff change tracking, AshPaperTrail.ChangeBuilders.FullDiff.ListChange pairs each prior array element against the new list by rebuilding the remaining-elements accumulator with acc ++ [tuple] on every step, copying the growing list each time, so the pairing scales cubically in the array length. Nothing bounds the length and the value comes straight from action input, so one request carrying a large accepted {:array, _} attribute forces tens of seconds of CPU and multi-gigabyte allocations. This issue affects ash_paper_trail: from 0.1.1 before 0.7.0.

CVSS

No CVSS.

References

Link	Resource
https://cna.erlef.org/cves/CVE-2026-77831.html
https://github.com/ash-project/ash_paper_trail/commit/e781f5d8840b07d57db99f9a4728298837d7b3a8
https://github.com/ash-project/ash_paper_trail/security/advisories/GHSA-7c66-59m8-723c
https://osv.dev/vulnerability/EEF-CVE-2026-77831
https://github.com/ash-project/ash_paper_trail/security/advisories/GHSA-7c66-59m8-723c

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-30 01:20

Updated : 2026-09-01 21:15

NVD link : CVE-2026-77831

Mitre link : CVE-2026-77831

CVE.ORG link : CVE-2026-77831

JSON object : View

Products Affected

No product.

CWE

CWE-407

Inefficient Algorithmic Complexity

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Nothing bounds the length and the value comes straight from action input, so one request carrying a large accepted {:array, _} attribute forces tens of seconds of CPU and multi-gigabyte allocations.\n\nThis issue affects ash_paper_trail: from 0.1.1 before 0.7.0."}], "lastModified": "2026-09-01T21:15:00.147", "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}