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CVE-2026-21577

This High severity DoS (Denial of Service) vulnerability was introduced in versions 9.0.1, 9.1.0, 9.2.0, 9.3.1, 9.4.0, 9.5.1, 10.0.2, 10.1.0 and 10.2.0 of Confluence Data Center. This DoS (Denial of Service) vulnerability, with a CVSS Score of 7.1, allows an authenticated attacker to cause a resource to be unavailable for its intended users by temporarily or indefinitely disrupting services of a host connected to a network. Atlassian recommends that Confluence Data Center customers upgrade
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:a91c4dd31c132b5be94429ddc6145fec34e0884ee21f876b201fa76dd8be51a2
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"description":"DoS (Denial of Service)","lang":"en","type":"DoS (Denial of Service)"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:70f66365db6c625d17658ef608fb13671107c545930de85fb063e94f69d1e747 · sha256:c29b74a1de2308ab… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:70f66365db6c625d17658ef608fb13671107c545930de85fb063e94f69d1e747 · sha256:c29b74a1de2308ab… · /containers/adp/0/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"Confluence Data Center","vendor":"Atlassian","versions":[{"status":"affected","version":"10.2.0 to 10.2.6"},{"status":"affected","version":"10.1.0 to 10.1.2"},{"status":"affected","version":"10.0.2 to 10.0.3"},{"status":"affected","version":"9.5.1 to 9.5.4"},{"status":"affected","version":"9.4.0 to 9.4.1"},{"status":"affected","version":"9.3.1 to 9.3.2"},{"status":"affected","version":"9.2.0 to 9.2.15"},{"status":"affected","version":"9.1.0 to 9.1.1"},{"status":"affected","version":"9.0.1 to 9.0.3"},{"status":"unaffected","version":"10.2.7 to 10.2.14"},{"status":"unaffected","versi…
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:70f66365db6c625d17658ef608fb13671107c545930de85fb063e94f69d1e747 · sha256:c29b74a1de2308ab… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:70f66365db6c625d17658ef608fb13671107c545930de85fb063e94f69d1e747 · sha256:c29b74a1de2308ab… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"description":"DoS (Denial of Service)","lang":"en","type":"DoS (Denial of Service)"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:70f66365db6c625d17658ef608fb13671107c545930de85fb063e94f69d1e747 · sha256:c29b74a1de2308ab… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-400","description":"CWE-400 Uncontrolled Resource Consumption","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:70f66365db6c625d17658ef608fb13671107c545930de85fb063e94f69d1e747 · sha256:c29b74a1de2308ab… · /containers/adp/0/problemTypes/0/descriptions/0

Source references

2 source assertions
{"url":"https://confluence.atlassian.com/pages/viewpage.action?pageId=1821999345"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:70f66365db6c625d17658ef608fb13671107c545930de85fb063e94f69d1e747 · sha256:c29b74a1de2308ab… · /containers/cna/references/0
{"url":"https://jira.atlassian.com/browse/CONFSERVER-104334"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:70f66365db6c625d17658ef608fb13671107c545930de85fb063e94f69d1e747 · sha256:c29b74a1de2308ab… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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