CVE-2026-77267

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Source
https://cve.org/CVERecord?id=CVE-2026-77267
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77267.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-77267
Aliases
Published
2026-09-22T17:52:25Z
Modified
2026-10-28T02:31:10Z
Severity
  • 8.3 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N CVSS Calculator
Summary
mcp-atlassian has an incomplete SSRF remediation
Details

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the X-Atlassian-Jira-Url and X-Atlassian-Confluence-Url headers are processed by _process_authentication_headers and used to construct Atlassian fetchers without calling validate_url_for_ssrf. A caller who can set these headers can supply an internal or metadata-service URL and cause the server to send requests to that destination, bypassing the incomplete CVE-2026-27826 remediation. This issue is fixed in version 0.22.0.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77267.json"
}
References

Affected packages

Git / github.com/sooperset/mcp-atlassian

Affected ranges

Type
GIT
Repo
https://github.com/sooperset/mcp-atlassian
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b041733473f95119dd539542a43c280737a8e460
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.22.0"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "b041733473f95119dd539542a43c280737a8e460"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "v0.22.0",
            "range": [
                {
                    "fixed": "b041733473f95119dd539542a43c280737a8e460"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "cpe": "cpe:2.3:a:mcp-atlassian:mcp_atlassian:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.22.0"
                }
            ],
            "source": "CPE_RANGE"
        }
    ]
}

Affected versions

v0.*
v0.1.10
v0.1.11
v0.1.12
v0.1.13
v0.1.14
v0.1.15
v0.1.16
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.10.0
v0.10.1
v0.10.2
v0.10.3
v0.10.4
v0.10.5
v0.10.6
v0.11.0
v0.11.1
v0.11.10
v0.11.11
v0.11.12
v0.11.2
v0.11.3
v0.11.4
v0.11.5
v0.11.6
v0.11.7
v0.11.8
v0.11.9
v0.12.0
v0.13.0
v0.13.1
v0.14.0
v0.14.1
v0.14.2
v0.14.3
v0.15.0
v0.16.0
v0.16.1
v0.17.0
v0.18.0
v0.18.1
v0.19.0
v0.2.0
v0.2.1
v0.2.2
v0.2.3
v0.2.4
v0.2.5
v0.2.6
v0.20.0
v0.20.1
v0.21.0
v0.21.1
v0.3.0
v0.3.1
v0.4.0
v0.5.0
v0.6.0
v0.6.1
v0.6.2
v0.6.3
v0.6.4
v0.6.5
v0.7.0
v0.7.1
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77267.json"