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CVE-2026-100307

Missing authorization on the external management API in mcp-gateway-registry enables privilege escalation to registry administrator

8.7 High

CVE-2026-100307 is a high vulnerability (CVSS 8.7) in Aws Mcp-gateway-registry, published November 11, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.47%, the 41st percentile. No source names a fixed version.

What does this mean?
Severity
8.7 HighCVSS 4.0, CVE List
Exploit chance
0.47%EPSS, 41st percentile
Exploitation
None knownNot on CISA’s or ENISA’s lists
Fixed in
No fix listedNo source names one

Description

Missing authorization in the external management API in Amazon mcp-gateway-registry 1.0.9 through 1.24.7 might allow an authenticated remote user to assign the registry administrator scope to their own identity group and obtain administrative control of every registered gateway asset via a crafted group import request.

To remediate this issue, users should upgrade to version 1.25.0.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.47%Unchanged since Nov 12, 2026
90%50%10%1%

Discussion

Quiet in the last day.
14 days ago: 0 people13 days ago: 0 people12 days ago: 0 people11 days ago: 0 people10 days ago: 0 people9 days ago: 0 people8 days ago: 0 people7 days ago: 0 people6 days ago: 0 people5 days ago: 0 people4 days ago: 0 people3 days ago: 1 person2 days ago: 0 people1 day ago: 0 peopleLast 24 hours: 0 people

Affected products

What each source reports

CVE List Score used8.7

Missing authorization on the external management API in mcp-gateway-registry enables privilege escalation to registry administrator

Missing authorization in the external management API in Amazon mcp-gateway-registry 1.0.9 through 1.24.7 might allow an authenticated remote user to assign the registry administrator scope to their own identity group and obtain administrative control of every registered gateway asset via a crafted group import request.

To remediate this issue, users should upgrade to version 1.25.0.

Record
CVE-2026-100307
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-862, CWE-266
Updated
2026-11-11
EUVDEUVD-2026-1240098.7

Missing authorization in the external management API in Amazon mcp-gateway-registry 1.0.9 through 1.24.7 might allow an authenticated remote user to assign the registry administrator scope to their own identity group and obtain administrative control of every registered gateway asset via a crafted group import request.

To remediate this issue, users should upgrade to version 1.25.0.

Record
EUVD-2026-124009
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-11
NVD8.7

Missing authorization in the external management API in Amazon mcp-gateway-registry 1.0.9 through 1.24.7 might allow an authenticated remote user to assign the registry administrator scope to their own identity group and obtain administrative control of every registered gateway asset via a crafted group import request.

To remediate this issue, users should upgrade to version 1.25.0.

Record
CVE-2026-100307
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/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
8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-266, CWE-862
Updated
2026-11-11
OSV8.7

Missing authorization on the external management API in mcp-gateway-registry enables privilege escalation to registry administrator

Missing authorization in the external management API in Amazon mcp-gateway-registry 1.0.9 through 1.24.7 might allow an authenticated remote user to assign the registry administrator scope to their own identity group and obtain administrative control of every registered gateway asset via a crafted group import request.

To remediate this issue, users should upgrade to version 1.25.0.

Record
CVE-2026-100307
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-266, CWE-862
Updated
2026-11-13

History

History
RecordedChangedSources
aliases, referencesNVD, OSV
aliases, publishedEUVD
first indexedCVE List

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

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