# CVE-2026-127281: lanyulei ferry JWT Validation auth.go improper authentication

Status: published. Published: 2026-11-13. Updated: 2026-11-13.

A vulnerability was found in lanyulei ferry 1.0.0-beta.1/1.0.0. Affected is an unknown function of the file middleware/auth.go of the component JWT Validation. The manipulation results in improper authentication. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- lanyulei / ferry: 1.0.0 (affected); 1.0.0-beta.1 (affected). Source: CNA: VulDB

## Severity and prioritization

- CVSS 4.0: 6.9 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P; source: CNA: VulDB

- CVSS 3.1: 7.3 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 3.0: 7.3 (high); CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C; source: CNA: VulDB

- CVSS 2.0: 7.5 (high); AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:C; source: CNA: VulDB

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-287

## Exploit evidence

- exploit: https://github.com/liumiya63-arch/CVE/blob/main/ferry-CVE-en-20261018/CVE-ferry-jwt-auth-bypass.md (CNA: VulDB)

## References

- https://vuldb.com/vuln/436447 (CNA: VulDB; vdb-entry)

- https://vuldb.com/vuln/436447/cti (CNA: VulDB; signature, permissions-required)

- https://vuldb.com/cve/CVE-2026-127281 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1041008 (CNA: VulDB; third-party-advisory)

- https://vuldb.com/submit/1041009 (CNA: VulDB; third-party-advisory)

- https://github.com/liumiya63-arch/CVE/blob/main/ferry-CVE-en-20261018/CVE-ferry-jwt-auth-bypass.md (CNA: VulDB; exploit)

## Provenance

- CNA: VulDB: https://www.cve.org/CVERecord?id=CVE-2026-127281; retrieved 2026-11-13; source updated 2026-11-13

Revision: 4ce7d8c870782fd14926dad6d09cac6340a945a976294ba90f7fa7cc8b7bbb40

Canonical: https://y2.dev/cve/CVE-2026-127281

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