CVE-2026-28342 OliveTin: Unauthenticated Denial of Service via Memory Exhaustion in PasswordHash API Endpoint
Unauthenticated attackers can cause denial of service in OliveTin by exhausting memory via concurrent requests to the PasswordHash API endpoint.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-28342?
CVE-2026-28342 is a high-severity denial of service vulnerability in OliveTin, published on 5 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OliveTin gives access to predefined shell commands from a web interface. Prior to version 3000.10.2, the PasswordHash API endpoint allows unauthenticated users to trigger excessive memory allocation by sending concurrent password hashing requests. By issuing multiple parallel requests, an attacker can exhaust available container memory, leading to service degradation or complete denial of service (DoS). The issue occurs because the endpoint performs computationally and memory-intensive hashing operations without request throttling, authentication requirements, or resource limits. This issue has been patched in version 3000.10.2.
Which versions are affected by CVE-2026-28342?
3 open source packages ship an affected version, including github.com/OliveTin/OliveTin. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/OliveTin/OliveTin Go | All versions | 0.0.0-20260227002407-2eb5f0ba79d4 |
github.com/OliveTin/OliveTin Go | All versions | 0.0.0-20260227002407-2eb5f0ba79d4 |
github.com/OliveTin/OliveTin Go | All versions | 0.0.0-20260227002407-2eb5f0ba79d4 |
Products include Olivetin Olivetin.
How do I fix CVE-2026-28342?
Upgrade github.com/OliveTin/OliveTin to 0.0.0-20260227002407-2eb5f0ba79d4 or later.
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-2026-28342 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-28342 exists.
Other vulnerabilities in OliveTin
- CVE-2026-27626 OliveTin: OS Command Injection via `password` argument type and webhook JSON extraction bypasses shell safety checks
- CVE-2026-30223 OliveTin: JWT Audience Validation Bypass in Local Key and HMAC Modes
- CVE-2026-31817 OliveTin's unsafe parsing of UniqueTrackingId can be used to write files
- CVE-2026-28789 OliveTin: Unauthenticated DoS via concurrent map writes in OAuth2 state handling
- CVE-2026-28790 OliveTin: Unauthenticated Action Termination via KillAction When Guests Must Login
Sources
Also known as GHSA-pc8g-78pf-4xrp, GO-2026-4584.