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CVE-2026-27826

🗓️ 10 Mar 2026 18:46:12Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 278 Views

Unauthenticated SSRF via unvalidated headers in MCP Atlassian enabling outbound requests before 0.17.0.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-27826
10 Mar 202618:46
–attackerkb
circl
Circl
CVE-2026-27826
24 Feb 202611:57
–circl
cnnvd
CNNVD
MCP Atlassian code issues and vulnerabilities
10 Mar 202600:00
–cnnvd
cvelist
Cvelist
CVE-2026-27826 MCP Atlassian has SSRF via unvalidated X-Atlassian-Jira-Url / X-Atlassian-Confluence-Url headers
10 Mar 202618:46
–cvelist
euvd
EUVD
EUVD-2026-10788
10 Mar 202618:48
–euvd
euvd
EUVD
EUVD-2026-10789
10 Mar 202618:46
–euvd
euvd
EUVD
EUVD-2026-84621
22 Sep 202617:52
–euvd
euvd
EUVD
EUVD-2026-84627
22 Sep 202617:58
–euvd
euvd
EUVD
EUVD-2026-84759
22 Sep 202618:47
–euvd
github
Github Security Blog
MCP Atlassian: DNS-rebinding TOCTOU bypass of the SSRF fix (CVE-2026-27826)
10 Jul 202618:01
–github
Rows per page
NVD
Vulners
Node
[
  {
    "vendor": "sooperset",
    "product": "mcp-atlassian",
    "versions": [
      {
        "version": "< 0.17.0",
        "status": "affected"
      }
    ]
  }
]

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17 Jun 2026 10:27Current
6.4Medium risk
Vulners AI Score6.4
CVSS 3.18.2
EPSS0.01042
SSVC
278