GitHub Advisoryadvisory · npm
GHSA-xc76-5pf9-mx8m In Azle, calling `setTimer` causes infinite loop of timers
HIGH
Official page ↗
- Aliases
- CVE-2025-29776
- Ecosystem
- npm
- Packages
- azle
- Severity
- High
- 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
- Weaknesses
- CWE-835
- Reviewed
- 2025-03-14
Affected packages
• npm azle: >= 0.27.0, < 0.30.0 → fixed in 0.30.0
Description
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.
Related
Alias · CVE (1)
- CVE-2025-29776 Azle is a WebAssembly runtime for TypeScript and JavaScript on ICP. vulnerability
Weakness · CWE (1)
- CWE-835 Loop with Unreachable Exit Condition weakness