CVE-2026-19593
Arbitrary code execution via attacker-controlled .git/config when opening a workspace
Is CVE-2026-19593 being exploited?
Not confirmed. CVE-2026-19593 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.29% probability of exploitation in the next 30 days.
How severe is CVE-2026-19593?
CVE-2026-19593 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-19593?
Not known from our data. No patch reference has been recorded for CVE-2026-19593, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-19593 affect?
CVE-2026-19593 affects OpenAI Codex Desktop (Windows), OpenAI Codex Desktop (macOS), User systems with Git on PATH, Workspaces with preserved .git/config. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-19593?
Do not open untrusted repos; remove preserved .git/config; block/inspect affected workspaces; apply vendor patch when released.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker can run arbitrary programs as the signed-in user, read/modify/delete files, and steal credentials if Git is on PATH.
Immediate action required
- affected>= 260202.0859 and <= 26.513.31313
- affected>= 26.304.38 and <= 26.513.40821
- affected>= 26.304.38.0 and <= 26.513.4821.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.