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CVE-2026-85674

aider 0.86.2 Remote Code Execution via .aider.conf.yml

CVSS 4.0 8.5 HIGHCVSS 3.1 7.8 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-85674

Published

aider (aider-chat) automatically loads a .aider.conf.yml configuration file from the root of the git repository it is launched in. A crafted repository can set test-cmd (executed at startup) or lint-cmd (executed on the first file edit), which aider runs through a shell (subprocess with shell=True) without any user confirmation, LLM interaction, or API key. Consequently, a user who clones and runs aider inside an attacker-supplied repository achieves arbitrary command execution on their machine. The behavior is long-standing and was confirmed on 0.86.3.dev (current main).

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-85674

Published

aider

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Aider-AI",
                    "product": "aider",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:pypi/aider-chat",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThanOrEqual": "0.86.2"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON