What is CVE-2023-34339?

CVE-2023-34339 is a low-severity vulnerability in Jetbrains Ktor, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 3.3/10. Published 2023-06-01.

How severe is CVE-2023-34339?

Low severity. CVSS v3 base score is 3.3 out of 10.

Information disclosure in Jetbrains Ktor

CVE-2023-34339

In JetBrains Ktor before 2.3.1 headers containing authentication data could be added to the exception's message

Published 2023-06-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (10.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Jetbrains Ktor — versions 0

Weakness classification (CWE)

CWE-209 — Generation of Error Message Containing Sensitive Information

References

www.jetbrains.com/privacy-security/issues-fixed/ (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-34339?: CVE-2023-34339 is a low-severity vulnerability in Jetbrains Ktor, classified under Generation of Error Message Containing Sensitive Information. CVSS score: 3.3/10. Published 2023-06-01.
How severe is CVE-2023-34339?: Low severity. CVSS v3 base score is 3.3 out of 10.