What is CVE-2026-34978?

CVE-2026-34978 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. OpenPrinting CUPS: Path traversal in RSS notify-recipient-uri enables file write outside CacheDir/rss (and clobbering of job.cache)

Which CVE IDs does CVE-2026-34978 cover?

CVE-2026-34978 covers the following CVE IDs: CVE-2026-34978. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-34978?

CVE-2026-34978 has a CVSS v3 base score of 6.5, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-34978?

CVE-2026-34978 affects 1 product, including: azl3 cups 2.4.16-1 on Azure Linux 3.0.

CVE-2026-34978MediumCVSS 6.5

OpenPrinting CUPS: Path traversal in RSS notify-recipient-uri enables file write outside CacheDir/rss (and clobbering of job.cache)

Vendor

Microsoft Security Response Center (MSRC)

Published

June 2, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-34978 →

🎯 Affected products1

azl3 cups 2.4.16-1 on Azure Linux 3.0

✅ Remediation

KBCBL-Mariner Releases (Security Update) — fixed build 2.4.17-1

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-34978
referencehttps://learn.microsoft.com/en-us/azure/azure-linux/tutorial-azure-linux-upgrade