What is CVE-2026-86255?

CVE-2026-86255 is a medium-severity vulnerability in Wger-Project Wger, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-09-06.

How severe is CVE-2026-86255?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Resource exhaustion in Wger-Project Wger

CVE-2026-86255

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.

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Wger-project Wger

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-86255?: CVE-2026-86255 is a medium-severity vulnerability in Wger-Project Wger, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2026-09-06.
How severe is CVE-2026-86255?: Medium severity. CVSS v3 base score is 6.5 out of 10.