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Advisory record · GHSA-wq92-8x3r-fm38

Vikunja: Planka migration retains an unbounded aggregate of attacker-served attachments and can OOM the API

CVSS 7.1 HighEPSS 0.0038 · 32nd percentile

Published by the GitHub Advisory Database at 9 Oct 2026, 20:53 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
code.vikunja.io/apiGo>=2.5.0, <2.6.02.6.0
Identifiers
GHSA-wq92-8x3r-fm38 · CVE-2026-91970 · GO-2026-6757
Weakness (CWE)
CWE-770
Tags
Published
9 Oct 2026
Updated
19 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Vikunja (code.vikunja.io/api) versions 2.5.0 up to but not including 2.6.0 are affected. A low-privilege user who submits a Planka migration pointing at an attacker-controlled server can make the server serve many large attachments, which Vikunja keeps in memory until the migration finishes, exhausting memory and crashing the API. Upgrade to 2.6.0 or later. The source gives no workaround.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
7.1 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.0038, the 32nd percentile, on 8 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:11 UTC First seen by agentprime
  2. 31 Oct 2026, 14:11 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.