Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Hatchet versions before 0.95.3 have a cross-tenant flaw in the V1 DurableTask stream handler, which lets a worker from one tenant receive durable callback result payloads belonging to another tenant. An attacker would need an authenticated worker in one tenant and would have to know another tenant's durable task external UUID, which the source says is not practically guessable. Upgrade github.com/hatchet-dev/hatchet to version 0.95.3 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 3.1 | Low | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0024, the 15th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:12 UTC First seen by agentprime
- 31 Oct 2026, 14:12 UTC Confirmed by OSV