CVE-2026-81100Disclosure

LOWCVSS 7.6 · HIGH

Signal is active with 2 mentions in latest observed window

Immediate actions

Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

tiger-gh-mcp-server started its MCP HTTP transport without enabling the host allow-list the underlying SDK provides. src/httpServer.ts called the shared httpServerFactory helper and never set the DNS-rebinding-protection option, so the transport accepted a request whatever host it named, making the locally reachable GitHub MCP endpoint drivable from a page in a visitor's browser that pointed a name it controlled at the bound address. The fix passes the option explicitly alongside a dependency update; the update alone would not have closed it. The repository has published no release that brackets the fix, so the affected boundary is the commit preceding it.

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0.0/ 10 priority

Sources & remediation

Other references

Weakness type (CWE)

CWE-346

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Threat summary

2 mentions across 1 observed day

What's happening

Technical details provided in 2 signals
Disclosure: 2 classified signals
2 total mentions across 1 day

Deep dive

Activity timeline2 mentions / 1d

Signal classification1 categories

Disclosure

2100.0%

Referenced assets2 URLs

By indicator

Full discourse2 posts

Infoflowcloud@infoflowcloud46d
Disclosure
🚨*CVE* CVE-2026-81100 tiger-gh-mcp-server started its MCP HTTP transport without enabling the host allow-list the underlying SDK provides. src/httpServer.ts called the shared httpServerFac… https://www.cve.org/CVERecord?id=CVE-2026-81100 ----- Traducción: CVE-2026-81100 tig… https://infoflow.cloud`
Post summary
The tweet announces CVE-2026-81100, noting that TIGG-GH-MCP-Server failed to enable the SDK’s host allow‑list for its MCP HTTP transport, without providing a patch, PoC, or exploit details.
1001041
102 followersView on X
CVE@CVEnew46d
Disclosure
CVE-2026-81100 tiger-gh-mcp-server started its MCP HTTP transport without enabling the host allow-list the underlying SDK provides. src/httpServer.ts called the shared httpServerFac… https://www.cve.org/CVERecord?id=CVE-2026-81100
Post summary
CVE‑2026‑81100 is disclosed to arise from tiger‑gh‑mcp‑server launching its HTTP transport without enabling the SDK’s host allow‑list; the text offers a technical detail but no PoC, exploit, or patch information.
10010983
58.0K followersView on X

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