What is CVE-2026-2297?

CVE-2026-2297 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. SourcelessFileLoader does not use io.open_code()

Which CVE IDs does CVE-2026-2297 cover?

CVE-2026-2297 covers the following CVE IDs: CVE-2026-2297. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by CVE-2026-2297?

CVE-2026-2297 affects 8 products, including: azl3 python3 3.12.9-10 on Azure Linux 3.0; azl3 python3 3.12.9-11 on Azure Linux 3.0; azl3 python3 3.12.9-13 on Azure Linux 3.0; azl3 python3 3.12.9-14 on Azure Linux 3.0; azl3 python3 3.12.9-9 on Azure Linux 3.0; and others — see the full list on the advisory page.

CVE-2026-2297Medium

SourcelessFileLoader does not use io.open_code()

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-2297 →

🎯 Affected products8

azl3 python3 3.12.9-10 on Azure Linux 3.0
azl3 python3 3.12.9-11 on Azure Linux 3.0
azl3 python3 3.12.9-13 on Azure Linux 3.0
azl3 python3 3.12.9-14 on Azure Linux 3.0
azl3 python3 3.12.9-9 on Azure Linux 3.0
cbl2 python3 3.9.19-19
cbl2 python3 3.9.19-19 on CBL Mariner 2.0
cbl2 python3 3.9.19-19 on CBL-Mariner 2.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 3.12.9-14 KBRelease Notes (Security Update)

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-2297
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade