In Azle, calling `setTimer` causes infinite loop of timers
Impact
Calling setTimer in Azle versions 0.27.0, 0.28.0, and 0.29.0 causes an immediate infinite loop of timers to be executed on the canister, each timer attempting to clean up the global state of the previous timer.
The infinite loop will occur with any valid invocation of setTimer.
Patches
The problem has been fixed as of Azle version 0.30.0.
Workarounds
If a canister is caught in this infinite loop after calling setTimer, the canister can be upgraded and the timers will all be cleared, thus ending the loop.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | azle | >= 0.27.0, < 0.30.0 | 0.30.0 |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L- Weakness (CWE)
CWE-835- Platform
- npm
- Package
azle- Disclosed
- 14.03.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-xc76-5pf9-mx8m - CC BY 4.0
Vulnerability history: azle
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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