7.1

CVE-2026-20240: splunk Improper Input Validation

CVSS: 7.1v3.1HighAnalyzed
Published 20-05-2026Last modified 20-05-2026
Open JSON

Vulnerability summary

CVE-2026-20240 is a high (CVSS 7.1) Improper Input Validation vulnerability in splunk. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.3% of scored vulnerabilities.

Overall risk
28/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.40%
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. 20-05-2026
    Last modifiedVulnerability information updated.

Description

In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.11, and 9.3.12, and Splunk Cloud Platform versions below 10.4.2603.1, 10.3.2512.9, 10.2.2510.11, 10.1.2507.21, 10.0.2503.13, and 9.3.2411.129, a low-privileged user that does not hold the ‘admin’ or ‘power’ Splunk roles could cause a Denial of Service by exploiting the `coldToFrozen.sh` script in the `splunk_archiver` app to rename critical Splunk directories, making the instance non-functional.<br><br>The Denial of Service is possible because of missing input validation in the `coldToFrozen.sh` script, which accepts arbitrary file paths and renames them without restricting operations to safe directories.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

32%

Versus all other CVEs

30-day change

0.00 pp

From 0.40% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.40%

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≥ 9.3.0, < 9.3.12 | ≥ 9.4.0, < 9.4.11 | ≥ 10.0.0, < 10.0.5 | ≥ 10.2.0, < 10.2.2
  • splunk_cloud_platform≥ 10.4.2603, < 10.4.2603.1 | ≥ 9.3.2411, < 9.3.2411.129 | ≥ 10.0.2503, < 10.0.2503.13 | ≥ 10.1.2507, < 10.1.2507.21 | ≥ 10.2.2510, < 10.2.2510.11 | ≥ 10.3.2512, < 10.3.2512.9 | 10.4.2603
  • splunk enterprise≥ 10.2, < 10.2.2 | ≥ 10.0, < 10.0.5 | ≥ 9.4, < 9.4.11 | ≥ 9.3, < 9.3.12

1 vendor · 3 products

References

1 links