CVE-2026-19593Network attack vector

Code execution via repository-controlled Git filters

Published Sep 1, 2026 · Updated Sep 2, 2026

Code execution in OpenAI Codex app for macOS 260202.0859 through 26.513.31313 allows attackers to run programs from crafted workspaces. Automatic Git metadata and working-tree inspection honors repository-controlled attr.tree and clean or process filter settings, causing Git to launch the configured program outside the command sandbox. Exploitation requires Git on PATH and a workspace whose local .git/config remains intact; an ordinary Git clone does not preserve that file.

CVSS severity9.8
Critical
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in OpenAI Codex app for macOS 260202.0859 through 26.513.31313 allows attackers to run programs from crafted workspaces. Automatic Git metadata and working-tree inspection honors repository-controlled attr.tree and clean or process filter settings, causing Git to launch the configured program outside the command sandbox. Exploitation requires Git on PATH and a workspace whose local .git/config remains intact; an ordinary Git clone does not preserve that file.

The record

CVE
CVE-2026-19593
Published
Sep 1, 2026
Updated
Sep 2, 2026
Vendor
OpenAI
Product
Codex app for macOS
Classifications
CWE-15, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=260202.0859 <=26.513.31313
  2. Affected versionversion=26.304.38.0 <=26.513.4821.0
  3. Affected versionversion=26.304.38 <=26.513.40821

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

OpenAI · Codex app for macOSversion=260202.0859 <=26.513.31313; version=26.304.38.0 <=26.513.4821.0; version=26.304.38 <=26.513.40821

Published CVSS scores

9.8National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-15External Control of System or Configuration Setting
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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