In Oraios AI Serena before 1.0.0, the listen address of the MCP server in HTTP mode is 0.0.0.0.

published 2026-09-14 56 d ago modified 2026-09-22 47 d ago also EUVD-2026-77175

cvss: 2.9; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 4%
public exploits: 0; none known

In Oraios AI Serena before 1.0.0, the listen address of the MCP server in HTTP mode is 0.0.0.0. NOTE: the Supplier observed that 0.0.0.0 was a "potential security hazard" but the Serena documentation, at the time of the issue report proposing 127.0.0.1 instead of 0.0.0.0, recommended "use a sandboxed environment for running Serena."

Patch / fix

fixed in 1 links 2

Oraios AI Serena 1.0.0

github.com/oraios/serena@b00ae29 commit
github.com/oraios/serena@a7af5c1 commit

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 56 d ago (2026-09-14)

Exploit prediction

0.16% chance of exploitation in the next 30 days, higher than 4% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

dash.security https://dash.security/blog/cve-2026-38924-unauthenticated-rce-in-the-serena-mcp-server referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	2.9	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

Oraios AI Serena

Classification

Weakness

CWE-669 Incorrect Resource Transfer Between Spheres

References

Sources

CVE List CVE-2026-38924
NVD CVE-2026-38924

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary