CVE-2026-77254

criticalPriorität · verfolgen · 0OT-Risiko · erhöhtEPSS 0.006 · 49. PerzentilUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.62% (49th) EPSS

CVSS 9.1 · critical

Is it mine?

1 products

Prüfe deine Angriffsfläche

Who says so?

1 sources

nvd

EPSS · bewertet 2026-10-27

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, requests to the HTTP MCP endpoint without a per-user identity are allowed to reach tool handlers, which then use globally configured Jira or Confluence credentials. A network caller can perform operations with the operator account's permissions unless the deployment has an independent authentication boundary. The advisory traces the vulnerable input and processing flow through streamable-http, UserTokenMiddleware, _get_fetcher, and global credentials, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.

cvss

Technischer Schweregrad, 0–10. Eine Zeile je Quelle.

9.1

010

Basiswert 0–10 · höher = schwerwiegender · Vektor überfahren zum Auflösen⚠ Quellen uneinig · high–critical · 8.3–9.1

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · security-advisories@github.comAusnutzbarkeit 3.9 · Auswirkung 5.2

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

SSVC

Eine Handlungsentscheidung — aus Ausnutzung und Auswirkung.

Exploitation: poc · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

schwächen

Die CWE-Schwächeklassen, zu denen dies gehört.

CWE-306USprimär

betroffene Produkte (1)

Betroffene Produkte und Versionsbereiche.

mcp-atlassian mcp atlassian< 0.22.0nvdUScpe:2.3:a:mcp-atlassian:mcp_atlassian:*:*:*:*:*:*:*:*

quellen

Welche Quellen diesen Datensatz belegen und wann.

nvd NVD CVE.org MITRE

veröffentlicht 2026-09-22geändert 2026-09-28

verwandt (4,465)

Verwandte Einträge.

ID	Schweregrad	EPSS	ausnutzbar	veröffentlicht
CVE-2026-67277US	high8.2OT kritisch	1.56% (75th)	KEV	2026-09-05
RouterOS accepts a "related" btest connection before the corresponding primary session has completed authentication. An unauthenticated client can use this state to start an IPv4 U…
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An improper access control vulnerability exists in the web management interface of PaperCut MF and PaperCut NG. Under specific conditions, unauthenticated remote requests targeting…
CVE-2026-72529US	—OT kritisch	1.46% (74th)	KEV	2026-08-19
A remote unauthorized attacker with network access via port 4307/TCP to the TrueConf server versions 5.3.X to 5.3.9, 5.4.X to 5.4.9, 5.5.X to 5.5.5, and earlier could execute an ar…
CVE-2026-56164US	critical9.8OT kritisch	1.01% (63rd)	KEV	2026-07-14
Missing authentication for critical function in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.
CVE-2026-59822US	high8.2OT kritisch	0.84% (58th)	KEV	2026-07-08
LiteLLM is a proxy server (AI Gateway) to call LLM APIs in OpenAI (or native) format. Prior to 1.84.0, LiteLLM's MCP Streamable HTTP endpoint allowed an unauthenticated attacker to…

+4460 weitere

Referenzen (4) nvd

Externe Belege — Patches, Meldungen, Analysen.

https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460Patch
https://github.com/sooperset/mcp-atlassian/pull/1448Issue TrackingPatch
https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0Release Notes
https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-vc8m-84rp-53hxExploitVendor Advisory

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