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Fencer Vulns
medium 4.4

CVE-2024-2689 json

Denial of Service if invalid UTF-8 sent

published 2024-04-03 2 y ago modified 2026-06-17 4 mo ago also GHSA-wmxc-v39r-p9wf , GO-2024-2689 , EUVD-2024-1323

cvss
4.4
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

Denial of Service in Temporal Server prior to version 1.20.5, 1.21.6, and 1.22.7 allows an authenticated user who has permissions to interact with workflows and has crafted an invalid UTF-8 string for submission to potentially cause a crashloop. If left unchecked, the task containing the invalid UTF-8 will become stuck in the queue, causing an increase in queue lag. Eventually, all processes handling these queues will become stuck and the system will run out of resources. The workflow ID of the failing task will be visible in the logs, and can be used to remove that workflow as a mitigation. Version 1.23 is not impacted. In this context, a user is an operator of Temporal Server.

Patch / fix

  • go github.com/temporalio/temporal 1.20.5, 1.21.6, 1.22.7
  • go go.temporal.io/server 1.20.5, 1.21.6, 1.22.7
  • Temporal Technologies, Inc. Temporal Server 1.20.5, 1.21.6, 1.22.7

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.49% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.4 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CISA ADP 3.1 4.4 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 4.4 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/temporalio/temporal
>=1.22.0-rc1, <1.22.7
>=1.21.0, <1.21.6
<1.20.5
1.22.7
1.21.6
1.20.5
go go.temporal.io/server
<1.20.5
>=1.21.0, <1.21.6
>=1.22.0-rc1, <1.22.7
1.20.5
1.21.6
1.22.7

Affected products

  • Temporal Technologies, Inc. Temporal Server

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.