Lucene search
+L

CVE-2026-49857 auth-fetch-mcp has SSRF Protection Bypass via IPv4-mapped IPv6 Loopback

🗓️ 13 Aug 2026 14:50:25Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 55 Views

auth-fetch-mcp 3.0.0 allows SSRF bypass via IPv4-mapped IPv6 loopback in assertSafeUrl.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-49857
13 Aug 202614:50
–attackerkb
circl
Circl
CVE-2026-49857
1 Jul 202620:35
–circl
cve
CVE
CVE-2026-49857
13 Aug 202614:50
–cve
euvd
EUVD
EUVD-2026-58054
13 Aug 202614:50
–euvd
github
Github Security Blog
auth-fetch-mcp has SSRF Protection Bypass via IPv4-mapped IPv6 Loopback
1 Jul 202618:16
–github
mend
Mend
CVE-2026-49857
13 Aug 202614:50
–mend
nvd
NVD
CVE-2026-49857
13 Aug 202615:19
–nvd
osv
OSV
GHSA-PVRJ-8CG3-J5F8 auth-fetch-mcp has SSRF Protection Bypass via IPv4-mapped IPv6 Loopback
1 Jul 202618:16
–osv
patchstack
Patchstack
NPM: auth-fetch-mcp has SSRF Protection Bypass via IPv4-mapped IPv6 Loopback
1 Jul 202618:16
–patchstack
ptsecurity
Positive Technologies
PT-2026-55211
1 Jul 202600:00
–ptsecurity
Rows per page
[
  {
    "vendor": "ymw0407",
    "product": "auth-fetch-mcp",
    "versions": [
      {
        "version": "< 3.0.2",
        "status": "affected"
      }
    ]
  }
]

Data

Build on a solid foundation with Vulners data

We provide the essential building blocks for cybersecurity solutions with comprehensive, structured, and constantly updated vulnerability and exploits data

Api

Power your application with Vulners API

The Vulners REST API offers reliable, high-performance access to vulnerability intelligence, with 99.9% SLA uptime and CDN-backed data delivery for seamless global access

App

Assess and manage vulnerabilities with Vulners tools

Built on top of Vulners' database and SDK, end-user solutions give security professionals and developers lightweight and powerful tools for vulnerability remediation

13 Aug 2026 14:50Current
CVSS 3.17.4
EPSS0.00488
SSVC
55