Security Digest · Vulnerability record
CVE-2026-19592: OpenAI Codex CLI vulnerability
OpenAI Codex CLI for Windows, macOS, and Linux and Codex Desktop for Windows and macOS automatically collected Git repository metadata without disabling the repository-local core.fsmonitor setting.
CVSS 7.3 High EPSS 0.1% · p1 Patch this week
Should you act?
Normal patch cycle
No exploitation signal; fix it in your next routine update if you are affected. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.
- Not in CISA KEV, but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.1%, percentile 1: FIRST’s model estimates a 0.1% chance of exploitation activity in the next 30 days, higher than 1% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs local access needed. Lower urgency for most teams unless an attacker could already run code on the machine.
- Editorial verdict: Patch this week. GitSpawn: Repo Git Config Runs Code in AI Coding Agents — Update your coding agents this week and never point one at a repository that arrived as files until you have read its .git/config; ordinary clones are not affected, and no attacks have been reported.
What it is
OpenAI Codex CLI for Windows, macOS, and Linux and Codex Desktop for Windows and macOS automatically collected Git repository metadata without disabling the repository-local core.fsmonitor setting. If a user opens or uses an attacker-prepared repository whose preserved .git/config sets core.fsmonitor to an attacker-controlled filesystem-monitor helper, Git can execute that helper while Codex collects repository metadata. The helper runs outside Codex's command sandbox and without a user-approval prompt, allowing attacker-controlled code to run with the user's privileges. The code can read, change, or delete the user's files and access other resources available to the user's account. An ordinary Git clone does not preserve the source repository's local .git/config; exploitation requires a repository delivered or copied with that configuration intact.
Weakness type: CWE-15.
Product: OpenAI Codex CLI · Assigned by: OAI · Published: 2026-09-01
Affected and fixed versions
| Vendor | Product | Affected versions (per CVE record) |
|---|---|---|
| OpenAI | Codex CLI | 0.102.0 <= 0.130.0 |
| OpenAI | Codex Desktop | 260202.0859 <= 26.513.31313 |
| OpenAI | Codex Desktop | 26.304.38 <= 26.513.40821 |
| OpenAI | Codex Desktop (Microsoft Store package) | 26.304.38.0 <= 26.513.4821.0 |
Severity scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADP | 3.1 | 7.3 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
- Attack vector: local access needed
- Attack complexity: low
- Privileges required: low (any account)
- User interaction: required (a user must click/open something)
- Scope: unchanged
CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.
Exploitation and urgency
- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc, automatable no, technical impact total.
- FIRST EPSS (model of 2026-10-21): 0.11% probability of exploitation activity in the next 30 days; percentile 1.
Timeline
- — CVE record published by OAI
- — erroneo.us brief: GitSpawn: Repo Git Config Runs Code in AI Coding Agents
- — CVE record last updated
Sources and references
Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.
Vulnerability records
- CVE.org record CVE-2026-19592 cve.org
- NVD entry CVE-2026-19592 nvd.nist.gov
Other references from the CVE record and advisory
- github.com github.com