Atlassian October bulletin covers 75 third-party product CVEs
Six unique flaws are rated critical, but Atlassian assesses non-critical customer risk and cites no exploitation.
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Product
Bitbucket
- Mentions · 7d0
- Mentions · 30d11
- All mentions14
- First seenAug 27, 2026
- Last mentioned7d ago
Timeline
14 articles · newest firstAtlassian October bulletin lists 176 flaw entries in Jira and Confluence
Critical scores are third-party library ratings; Atlassian says its product risk is lower and not immediately critical.
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October Patch Tuesday roundup: Over 1,400 Microsoft holes to be plugged, including three zero days
Microsoft's October Patch Tuesday fixes 1,407 CVEs, including an exploited Windows Shell Mark-of-the-Web bypass.
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12th October – Threat Intelligence Report
Check Point's weekly report covers a Denmark registry breach of 8.8 million people, ransomware, and exploited enterprise flaws.
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Attackers Target Critical Atlassian Vulnerability Within Hours of PoC Publication
Attackers probed critical Atlassian CVE-2026-21589 within hours of a public PoC, with 190 honeypot attempts.
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Scans for Atlassian vulnerablity (CVE-2026-21589), (Wed, Oct 7th)
Attackers are scanning Atlassian products for CVE-2026-21589, a traversal bug that can read web files.
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PoC Exploit Released for Critical Atlassian Flaw That Can Lead to Jira Admin Access
watchTowr released a detection PoC for unauthenticated Atlassian file-read CVE-2026-21589 that can yield Jira admin access.
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Hackers exploit critical Atlassian flaw after public PoC release
Attackers began exploiting critical Atlassian flaw CVE-2026-21589 within hours of a public proof of concept.
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Atlassian and OpenAI expand partnership to turn enterprise knowledge into action
Atlassian and OpenAI will use GPT-6 models to power agents across Atlassian and Rovo.
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Atlassian security advisory (AV26-1002)
Canada's Cyber Centre warns Atlassian server products are affected by arbitrary file access CVE-2026-21589.
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Atlassian warns of critical file access flaw in its datacenter products
Atlassian urges patches for CVE-2026-21589, an unauthenticated file-read flaw in eight Data Center products.
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A zero-click RCE flaw in AI coding agents could have exposed enterprise systems
Researchers disclosed Plugin4Shell, a zero-click RCE in Claude Code, Codex, Gemini CLI, and Copilot caused by unverified Git plugin checkouts.
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Plugin4Shell Lets Repository Owners Swap Pinned Plugin Code Across Four AI Coding Agents
Air Security disclosed Plugin4Shell, letting repository owners swap version-locked plugins in Claude Code, Codex, GitHub Copilot, and Gemini CLI.
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Version Control DFIR: a Cheatsheet to GitHub, GitLab, Bitbucket, and Azure DevOps
Wiz published a DFIR cheatsheet covering log visibility, incident readiness, and threat hunting across GitHub, GitLab, Bitbucket, and Azure DevOps.
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Related CVEs
by mentions- CVE-2026-2158999%9.3Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability
- CVE-2026-65637<1%9.8Improper Input Validation vulnerability in Apache Tomcat due to incomplete fix for CVE-2026-32990
- CVE-2026-58062<1%9.3In Bouncy Castle for Java before 1.85, Stapled OCSP response accepted without binding to the checked certificate
- CVE-2026-65182<1%9.1Improper Access Control, Incorrect Authorization vulnerability in Apache Tomcat leads to security constraint bypass if a constraint for a longer path is…
- CVE-2026-75595<1%9.1Netty: Io.netty.handler.ssl.SslClientHelloHandler#decode checks the wrong offset before reading the four-byte TLS handshake header, so a…
- CVE-2026-68525<1%9.1Incorrect Authorization vulnerability in Apache Tomcat's FORM authentication process allows the bypassing of a security constraint that limits user has access…
- CVE-2026-9722918%10.0Unauthenticated RCE in GitLab CE/EE via CI/CD regex
- CVE-2026-8877911%8.7Unauthenticated denial of service in NetScaler ADC and Gateway
- Code injection in IBM i HTTP Server Administration
- Signature check flaw enables privilege elevation in SharePoint Server
Appears with
- Confluenceproduct · 11
- Atlassianvendor · 11
- Bambooproduct · 8
- Crowdproduct · 7
- Atlassianorganization · 6
- Jira Service Managementproduct · 6
- Jiraproduct · 6
- Jira Softwareproduct · 5
- Fisheyeproduct · 5
- Crucibleproduct · 5
- watchTowrorganization · 4
- OpenAIvendor · 3
- Codexproduct · 3
- GitHub Copilotproduct · 2
- Anthropicvendor · 2
- GitHubvendor · 2
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