EUVD-2026-88031Published

Obot before v0.23.0 Server-Side Request Forgery via MCP

Collected exploitation and prediction evidence

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

cve-program · CVE-2026-101064

Published

Obot before v0.23.0 contains a server-side request forgery vulnerability in remote MCP server registration that allows privileged users to specify arbitrary URLs without destination validation. Attackers with Power User or higher roles can coerce Obot to make requests to internal services and cloud metadata endpoints, reading responses in error messages to disclose sensitive credentials.

Source published: 27 Sep 2026 20:49:55 UTC
Source modified: 28 Sep 2026 13:01:29 UTC
Observed here: 23 Oct 2026 15:48:27 UTC
Source terms: CVE Program Terms of Use

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: cve-program · CVE Program Terms of Use. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · 8.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

CVSS 3.1 · 7.6 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

euvd · EUVD-2026-88031

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Sep 27, 2026, 8:49:55 PM

dateUpdated: Sep 28, 2026, 1:01:29 PM

Source published: Sep 27, 2026, 8:49:55 PM (timezone not stated)
Source modified: Sep 28, 2026, 1:01:29 PM (timezone not stated)
Observed here: 11 Nov 2026 05:28:00 UTC
Source terms: ENISA EUVD · source terms and attribution apply

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EUVD CVSS 4.0 · 8.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N

nvd · CVE-2026-101064

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Deferred

Weakness classifications: CWE-918

Original publisher date fields

published: 2026-09-27T21:17:01.893

lastModified: 2026-09-28T21:02:16.150

Source published: 27 Sep 2026 21:17:01 UTC
Source modified: 28 Sep 2026 21:02:16 UTC
Observed here: 25 Oct 2026 04:17:26 UTC
Source terms: NIST NVD usage terms; underlying source attribution retained

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This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: nvd · NIST NVD usage terms; underlying source attribution retained. Source text is retained; field grouping and change labels are provided by ChangeIntel.

CVSS 4.0 · [email protected] · Secondary · 8.3 CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS 3.1 · [email protected] · Secondary · 7.6 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

osv · GHSA-jgh3-fggc-mcpm

Published

## Summary In affected versions, the URL of a remote MCP server is attacker-controlled at registration and is fetched server-side with no validation of the destination. There is no guard against loopback, link-local, RFC1918 private ranges, or the cloud metadata endpoint (`169.254.169.254`), so a use with the Power User, Power User Plus, or Admin role can coerce Obot into making requests to internal services and to the cloud instance metadata service, and read the responses. ## Am I affected? You are affected if you run Obot `<= v0.22.1` with authentication enabled and allow privileged users (with the Power User or higher privileges) to register remote MCP servers . The metadata-sync code path that triggers the fetch runs automatically during reconciliation, so no user interaction beyond registration is required. ## Details A remote server's URL (`RemoteRuntimeConfig.URL`) is accepted at registration after only checking that it is parseable and uses an `http`/`https` scheme — the destination is never constrained. Obot then connects to that URL when the server is launched or its OAuth state is checked, and the controller automatically fetches OAuth discovery metadata from it during reconcile. The one egress guard that exists (`DisallowLocalhostMCP`) is disabled by default, only blocks loopback when enabled, and is absent from the automatic metadata-fetch path. Because the fetched response body is reflected back in Obot's error messages, this is a non-blind SSRF. ## Impact An attacker can reach internal-only services and the cloud metadata service if they have the Power User, Power User Plus, or Admin role. Against `169.254.169.254` this can disclose the host's cloud IAM credentials, enabling a pivot into the cloud account. ## Mitigation Upgrade to **v0.23.0** or later, which applies a single outbound egress chokepoint — rejecting loopback, link-local (including `169.254.169.254`), RFC1918, and IPv6 ULA on the resolved IP at dial time — uniformly across the remote-MCP client and the OAuth-metadata client. ## Severity CVSS v3.1 Score: **7.6/10 (High)** — `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N` ## Credits The Obot team would like to thank HE WEI（ギカク）(https://www.linkedin.com/in/gikaku, [@hewei-gikaku](https://github.com/hewei-gikaku)) for responsibly disclosing this issue in accordance with our [security policy](https://github.com/obot-platform/obot/?tab=security-ov-file).

Source published: 18 Sep 2026 17:59:46 UTC
Source modified: 28 Sep 2026 17:10:39 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

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CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

Publisher rating · HIGH

osv · GO-2026-6522

Published

Obot: Server-Side Request Forgery via remote MCP server URL in github.com/obot-platform/obot

Source published: 28 Sep 2026 16:43:40 UTC
Source modified: 28 Sep 2026 17:10:39 UTC
Observed here: 24 Oct 2026 13:19:41 UTC
Source terms: OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.