7.5

CVE-2026-20239: splunk

CVSS: 7.5v3.1HighAnalyzed
Published 20-05-2026Last modified 21-05-2026
Open JSON

Vulnerability summary

CVE-2026-20239 is a high (CVSS 7.5) vulnerability in splunk. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 40.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.48%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 20-05-2026
    PublishedVulnerability first disclosed.
  2. 21-05-2026
    Last modifiedVulnerability information updated.

Description

In Splunk Enterprise versions below 10.2.2 and 10.0.5, and Splunk Cloud Platform versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13, a user with a role that has access to the `_internal` index could view session cookies and response bodies that contain sensitive data.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.48%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

0.00 pp

From 0.48% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.48%

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

Splunk3 products
  • splunk≥ 10.0.0, < 10.0.5 | ≥ 10.2.0, < 10.2.2
  • splunk_cloud_platform≥ 10.0.2503, < 10.0.2503.13 | ≥ 10.1.2507, < 10.1.2507.21 | ≥ 10.2.2510, < 10.2.2510.11 | ≥ 10.3.2512, < 10.3.2512.8
  • splunk enterprise≥ 10.2, < 10.2.2 | ≥ 10.0, < 10.0.5

1 vendor · 3 products

References

1 links