CVE-2026-77249

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Source

https://cve.org/CVERecord?id=CVE-2026-77249

Import Source

https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-77249.json

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2026-77249

Aliases

GHSA-v9m3-wfh8-5646

Published

2026-09-22T18:47:01Z

Modified

2026-09-23T11:30:46Z

Severity

5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator

Summary

MCP Atlassian: Incomplete fix for CVE-2026-27826: redirect-based SSRF via unhooked requests session in Jira user-permission lookup

Details

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, JiraUserMixin._lookup_user_by_permissions uses the module-level requests.get function instead of the fetcher's protected session. A caller-controlled public Jira URL can redirect that unhooked request to an internal address, bypassing the redirect checks added for CVE-2026-27826. The advisory traces the vulnerable input and processing flow through JiraUserMixin._lookup_user_by_permissions, requests.get, self.jira._session.get, and _make_ssrf_safe_hook, which identify the affected entry points, controls, and code paths. 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-2026-77249.json"
}

References

Affected packages

Git / github.com/sooperset/mcp-atlassian

Affected ranges

Type

GIT

Repo

https://github.com/sooperset/mcp-atlassian

Events

Introduced

Fixed

b041733473f95119dd539542a43c280737a8e460

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "0.22.0"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

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/osv-test-cve-osv-conversion/osv-output/CVE-2026-77249.json"