8.8

CVE-2026-76351: splunk Server-Side Request Forgery (SSRF)

CVSS: 8.8v3.1HighAnalyzed
Published 19-08-2026Last modified 21-08-2026
Open JSON

Vulnerability summary

CVE-2026-76351 is a high (CVSS 8.8) Server-Side Request Forgery (SSRF) vulnerability in splunk. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 34.6% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.42%
0%100%
Low · +0.17 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 19-08-2026
    PublishedVulnerability first disclosed.
  2. 21-08-2026
    Last modifiedVulnerability information updated.

Description

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the "admin" or "power" Splunk roles could use crafted report notification data to cause Splunk Secure Gateway to send a request to the Splunk Enterprise Representational State Transfer (REST) API using a system-level session token and modify the Splunk platform configuration. The user could then obtain a session token without a password and use it to access all relevant data and affect system integrity. The vulnerability is possible because Splunk Secure Gateway does not validate decoded report notification identifiers before using them to construct requests to the Splunk Enterprise REST API.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

0.42%

Chance of exploitation in the next 30 days

Percentile

35%

Versus all other CVEs

30-day change

+0.17 pp

From 0.24% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.42%

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≥ 9.4.0, < 9.4.14 | ≥ 10.0.0, < 10.0.9 | ≥ 10.2.0, < 10.2.6 | ≥ 10.4.0, < 10.4.2
  • splunk enterprise≥ 10.4, < 10.4.2 | ≥ 10.2, < 10.2.6 | ≥ 10.0, < 10.0.9 | ≥ 9.4, < 9.4.14
  • splunk_secure_gateway≥ 3.10, < 3.10.9 | ≥ 3.9, < 3.9.23 | ≥ 3.8, < 3.8.70 | ≥ 3.8.0, < 3.8.70 | ≥ 3.9.0, < 3.9.23 | ≥ 3.10.0, < 3.10.9

1 vendor · 3 products

References

1 links