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Recorded 29 Oct 2026 at 20:19 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.

CVECISA Known Exploited Vulnerabilities

Atlassian Multiple Products Files or Directories Accessible to External Parties Vulnerability

Multiple Atlassian products (Bitbucket Data Center ,Confluence Data Center, Jira Service Management Data Center, Jira Software Data Center, Bamboo Data Center, Crowd Data Center, Crucible and Fisheye) contain a files or directories accessible to external parties vulnerability which could allow an unauthenticated attacker to access specific files within the web application root directory in affected versions.

What it said

CVE
CVE-2026-21589
Vendor
Atlassian
Product
Multiple Products
CISA KEV
Listed 15 Oct 2026
Known ransomware use
Not stated
Federal remediation due
18 Oct 2026
Public detection template
Nuclei template listed
Public exploit code
Nuclei template listed

Source evidence when recorded

CISA KEV
Complete at observationRead 29 Oct 2026 at 20:17 UTC
Public detection templates (Nuclei)
Complete at observationRead 29 Oct 2026 at 20:17 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

What changed

  1. Detection template: Nuclei template listed
  2. Detection template: Nuclei template listed
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (8)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 29 Oct 2026 · 20:19:26 UTC Public detection templateNuclei template listed
  2. 29 Oct 2026 · 20:19:26 UTC Link: Vendor advisoryhttps://confluence.atlassian.com/security/cve-2026-21589-arbitrary-file-access-vulnerability-impacts-multiple-products-1870495748.html?ref=labs.watchtowr.com → No longer listed in this observation
  3. 29 Oct 2026 · 20:19:26 UTC Link: CISA-cited referencehttps://confluence.atlassian.com/security/cve-2026-21589-arbitrary-file-access-vulnerability-impacts-multiple-products-1870495748.html?ref=labs.watchtowr.com
  4. 28 Oct 2026 · 05:10:29 UTC Public exploit codeNuclei template listed
  5. 28 Oct 2026 · 05:10:29 UTC Source coverage: public-exploit-codeCurrent
  6. 28 Oct 2026 · 05:10:29 UTC Link: Nuclei templatehttps://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-21589.yaml
  7. 23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
  8. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 7 Nov 08:57 UTC · 274 of 275 readable · 272 fully read · documentation 469/469 current

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