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CVE

CVE-2026-27896

MCP Go SDK Vulnerable to Improper Handling of Case Sensitivity in github.com/modelcontextprotocol/go-sdk
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CVE

CVE-2026-27896

MCP Go SDK Vulnerable to Improper Handling of Case Sensitivity in github.com/modelcontextprotocol/go-sdk

MCP Go SDK Vulnerable to Improper Handling of Case Sensitivity in github.com/modelcontextprotocol/go-sdk

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7
-
4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/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
C
H
U
0
-
C
H
U
7.2
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Related Resources

No items found.

References

https://github.com/modelcontextprotocol/go-sdk/security/advisories/GHSA-wvj2-96wp-fq3f, https://nvd.nist.gov/vuln/detail/CVE-2026-27896, https://github.com/modelcontextprotocol/go-sdk/commit/7b8d81c264074404abdf5aa16e2cf0c2d9c64cc0

Severity

7.2

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.2
EPSS Probability
0.00045%
EPSS Percentile
0.14229%
Introduced Version
0,v1.2.0-pre.1,v0.0.0-20251211151656-a5e369ed125f,v0.0.0-20251208202441-87c81260e29a,v0.0.0-20251201162917-2ce44d45e9f6,v0.0.0-20251121211521-d9263f7e47ba,v1.1.0-pre.1,v0.0.0-20251007123949-9348d33b755c,v1.0.0,v0.0.0-20250929132912-294e1f360cc1,v0.8.0,v0.0.0-20250926155554-964574b81844,v0.5.0,v0.0.0-20250912145019-9f1b8646bdf6,v0.3.0,v0.0.0-20250822132951-c058c6a93ba6,v0.0.0-20250730172506-bacca7a1d24b,v0.1.0,v0.0.0-20250701170915-e1b1cd0072e4,v0.0.0-20250625204558-600ba61efe43,v0.0.0-20250625170905-204b59483b50,v0.0.0-20250618005433-d2f2f87bbe3d,v0.0.0-20250516182452-1323fb52169b,v0.0.0-20250424021539-14b18b2645fd,v0.0.0-20210324212620-cf8963447bbb
Fix Available
1.3.1,v1.3.1,v0.0.0-20260218153836-7b8d81c26407

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