CVE-2026-86255: wger before 2.5 Uncontrolled Resource Consumption via date_sequence

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-06 · updated 2026-09-18
Weakness: CWE-400

Description

wger before 2.5 fails to validate the maximum duration of routine date ranges, allowing authenticated users to create routines spanning arbitrarily long periods. Attackers can trigger the date_sequence computation via routine detail endpoints, forcing the server to iterate thousands of times per request and exhaust worker threads, denying service to legitimate users.

Affected products

wger-project wger: before 2.5 — fixed in 2.5

How to fix

Upgrade to a fixed version: wger-project wger 2.5. Check the vendor advisory for mitigations.

References

https://github.com/wger-project/wger/security/advisories/GHSA-v25j-wqcw-fvhj
https://www.vulncheck.com/advisories/wger-before-2.5-uncontrolled-resource-consumption-via-date-sequence

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