CVE-2025-29776
In Azle, calling `setTimer` causes infinite loop of timers
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.
How to fix CVE-2025-29776
To remediate CVE-2025-29776, upgrade the affected package to a fixed version below.
- —upgrade to 0.30.0 or later
Is CVE-2025-29776 being exploited?
Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 0.27.0, < 0.30.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |