Argo CD is a widely used GitOps CD tool; this RCE-style command injection can compromise repo-server credentials and supply-chain, impacting many Kubernetes deployments.
CVE-2026-55797
Command injection in Argo CD repo-server via crafted SSH proxy host
Is CVE-2026-55797 being exploited?
Not confirmed. CVE-2026-55797 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 1.5% probability of exploitation in the next 30 days.
How severe is CVE-2026-55797?
CVE-2026-55797 is rated High with a CVSS score of 8.8. 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-2026-55797?
Yes. A fix has been recorded for CVE-2026-55797. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-55797 affect?
CVE-2026-55797 affects Argo CD repo-server versions >=2.11.0 and prior to fixes in 3.3.15, 3.4.10, 3.5.4, 3.6.0-rc2. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-55797?
Upgrade to 3.3.15/3.4.10/3.5.4/3.6.0-rc2 and block untrusted repo/credential edits until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker who can create/update a repo or credential template can execute commands on repo-server and steal Git/Helm/OCI credentials.
Immediate action required
- affected>= 2.11.0 and <= 2.14.21
- affected>= 3.0.0 and < 3.3.15
- affected>= 3.4.0 and < 3.4.10
- affected>= 3.5.0 and < 3.5.4
- affected= 3.6.0-rc1
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.