5.3

CVE-2025-29904: jetbrains ktor HTTP Request/Response Smuggling

CVSS: 5.3v3.1MediumAnalyzed
Published 12-03-2025Last modified 12-03-2025
Open JSON

Vulnerability summary

CVE-2025-29904 is a medium (CVSS 5.3) HTTP Request/Response Smuggling vulnerability in jetbrains ktor. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.6% of scored vulnerabilities.

Overall risk
21/100
0100
Low · default modelHow is this calculated?
CVSS score
5.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.33%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 12-03-2025
    PublishedVulnerability first disclosed.
  2. 12-03-2025
    Last modifiedVulnerability information updated.

Description

In JetBrains Ktor before 3.1.1 an HTTP Request Smuggling was possible

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.33%

Chance of exploitation in the next 30 days

Percentile

25%

Versus all other CVEs

30-day change

+0.01 pp

From 0.32% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.33%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Jetbrains1 product

1 vendor · 1 product

References

1 links