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PatchSiren cyber security CVE debrief

CVE-2026-20260 Splunk CVE debrief

CVE-2026-20260 is a log injection vulnerability in Splunk SOAR (Security Orchestration, Automation, and Response) versions below 8.5.0. An unauthenticated attacker could inject American National Standards Institute (ANSI) escape codes into SOAR application log files through specially crafted HTTP request paths. A terminal emulator might interpret these codes when an administrator views the logs. The injection is possible because SOAR does not strip control characters from HTTP request paths before writing them to application logs.

Vendor
Splunk
Product
Splunk SOAR
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-10
Original CVE updated
2026-06-10
Advisory published
2026-06-10
Advisory updated
2026-06-10

Who should care

Administrators and users of Splunk SOAR versions below 8.5.0 should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability has a CVSS score of 4.3 and a severity of MEDIUM. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N. The weakness is classified as CWE-117.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade Splunk SOAR to version 8.5.0 or later.
  • Review and sanitize HTTP request paths to prevent injection of control characters.
  • Monitor application logs for suspicious activity.

Evidence notes

The CVE record was published on 2026-06-10T18:16:41.643Z and modified on 2026-06-10T18:36:19.463Z. The vulnerability was reported by [email protected].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-20260 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-20260

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-20260 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-20260

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.