CVE-2026-57860 | ForgeCode (tailcallhq/forgecode), an AI pair-programming CLI… | CVSS 7.8 HIGH

Description

ForgeCode (tailcallhq/forgecode), an AI pair-programming CLI, automatically loads and executes the MCP servers defined in a repository's .mcp.json file on startup without user confirmation. A malicious repository can supply a crafted .mcp.json whose mcpServers entries specify arbitrary command and args values (for example, command: bash with args: ['-c', 'touch /tmp/pwned']). When a user runs the forge CLI inside a cloned untrusted repository, the specified commands are spawned with the invoking user's privileges, resulting in arbitrary code execution. This provides a reliable initial-access and persistence primitive against developers who evaluate untrusted repositories with ForgeCode.

Metadata

CVE ID: CVE-2026-57860
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-06-25 18:48 UTC
Published: 2026-07-17 16:16 UTC
Last updated: 2026-07-17 16:45 UTC
Primary CWE: CWE-829
Inclusion of Functionality from Untrusted Control Sphere
Vendor / Product: tailcallhq / forgecode
Sources: cve.org · NVD

Severity & Metrics

7.8 HIGH CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
tailcallhq	forgecode	—	2.11.1

Weakness (CWE)

CWE	Source	Description
CWE-829	cna	Inclusion of Functionality from Untrusted Control Sphere

CVSS scores (2)

Score	Severity	Version	Source	Vector
8.4	HIGH	4.0	cna	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8	HIGH	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References (5)