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Atlassian, Splunk release patches for critical AI Toolkit flaw

Part of the CVE-2026-20266 story · since 17 Jun

Quiet for 11 weekslast report 20 Aug3 articles2 outlets
17 Jun · SecurityOnline first28 Aug21 SepNowThis article2nd of 3
  • Wed 17 Jun, 20:12 UTC. SecurityOnline, first report. Splunk AI Toolkit flaw allows arbitrary command execution.
  • Thu 18 Jun, 11:11 UTC. SecurityWeek, its first report on the story. Atlassian, Splunk release patches for critical AI Toolkit flaw. This article, 2nd of 3.
  • Thu 20 Aug, 05:20 UTC. SecurityOnline. Splunk patches AI Toolkit OS command injection flaw CVE-2026-20266.

Atlassian and Splunk have announced patches for critical vulnerabilities in their products. Splunk addressed a critical issue in its AI Toolkit (CVE-2026-20266) that could allow admin attackers to execute arbitrary OS commands. A medium-severity information disclosure vulnerability (CVE-2026-20265) was also fixed.

Atlassian published updates for 100 security bulletins related to vulnerabilities across multiple products, with several critical-severity issues found in third-party dependencies such as Axios and Apache Tomcat. Users are urged to update their software to mitigate risks.

How the story developed

All 3 articles
Quiet for 11 weekslast report 20 Aug3 articles2 outlets

3 articles from 2 outlets since 17 Jun. Quiet since 20 Aug. This was the 2nd report, 15 hours after the first.

Now17 Jun18192019 Aug211 NovFirst reportSecurityOnline · 17 Jun, 20:12This article2nd of 3 · day 1Picked up againafter 9 weeks quiet
  • Wed 17 Jun, 20:12 UTC. SecurityOnline, first report. Splunk AI Toolkit flaw allows arbitrary command execution.
  • Thu 18 Jun, 11:11 UTC. SecurityWeek, its first report on the story. Atlassian, Splunk release patches for critical AI Toolkit flaw. This article, 2nd of 3.
  • Thu 20 Aug, 05:20 UTC. SecurityOnline. Splunk patches AI Toolkit OS command injection flaw CVE-2026-20266.
  • CVE not in KEV
  • No CVE
  • Larger: an outlet’s first report
  • Coverage over time
  • Quiet time, folded
Show all 3 articles as a list
  1. Wed 17 JunDay 01
    1. Splunk AI Toolkit flaw allows arbitrary command execution20:12 · SecurityOnline · First report
  2. Thu 18 JunDay 11
    1. Atlassian, Splunk release patches for critical AI Toolkit flaw11:11 · SecurityWeek · This article, 2nd of 3

  3. Quiet for 9 weeks

    Thu 20 AugDay 641
    1. Splunk patches AI Toolkit OS command injection flaw CVE-2026-2026605:20 · SecurityOnline · Picked up again

Sources

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