CVE-2026-86255 wger before 2.5 Uncontrolled Resource Consumption via date_sequence
Authenticated attackers can cause denial of service in wger by creating routines with excessively long date ranges, exhausting server resources.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86255?
CVE-2026-86255 is a high-severity denial of service vulnerability in wger-project wger, published on 6 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-400
Which versions are affected by CVE-2026-86255?
2 open source packages ship an affected version, including wger.
| Package | Affected | Fixed in |
|---|---|---|
wger PyPI | All versions to 2.5 | None |
wger PyPI | All versions to 2.5 | None |
How do I fix CVE-2026-86255?
No fix has been published for CVE-2026-86255 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-86255 being exploited?
There is no known exploitation of CVE-2026-86255 in the wild and no public exploit code.
Sources
Also known as GHSA-v25j-wqcw-fvhj, GHSA-vh7q-hj8h-q34m.