CVE-2026-1777
SageMaker SDK leaks HMAC key; allows artifact uploads executed in training jobs.
Is CVE-2026-1777 being exploited?
Not confirmed. CVE-2026-1777 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 0.47% probability of exploitation in the next 30 days.
How severe is CVE-2026-1777?
CVE-2026-1777 is rated High with a CVSS score of 8.5. 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-2026-1777?
Yes. A fix has been recorded for CVE-2026-1777. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-1777 affect?
CVE-2026-1777 affects Amazon SageMaker, SageMaker Training Jobs, SageMaker Python SDK. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-1777?
Upgrade SDK to 3.2.0+ or 2.256.0+
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Exposes HMAC key; with API and S3 write perms, attacker can plant artifacts executed in next training job, risking remote code execution.
Patch when possible