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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.004 (36.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/wger-project/wger/security/advisories/GHSA-v25j-wqcw-fvhj (vendor-advisory)
- www.vulncheck.com/advisories/wger-before-2.5-uncontrolled-resource-consumption-… (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.