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CVE-2026-34311 is a critical vulnerability in the Opera component of Oracle Hospitality OPERA 5 Property Services. Affected supported versions are 5.6.19.24, 5.6.22, 5.6.25.19, 5.6.27.6, and 5.6.28. The flaw is remotely exploitable over HTTP by an unauthenticated attacker and requires no user interaction. Oracle describes successful exploitation as resulting in compromise and takeover of Oracle Hospitality OPERA 5 Property Services. The published CVSS v3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating low attack complexity and high impact across confidentiality, integrity, and availability. Specific vulnerable functions or root-cause details have not been publicly disclosed in the available information.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical remote vulnerability affecting Oracle Hospitality OPERA 5 Property Services multiple 5.6.x releases, with a CVSS score of 9.8.
A critical vulnerability in Oracle Opera 5 Property Services that allows unauthenticated remote attackers to gain administrative control via web requests.
An easily exploitable unauthenticated network-accessible vulnerability in Oracle Hospitality OPERA 5 Property Services that can lead to full takeover of the affected product over HTTP.
A critical unauthenticated remote compromise vulnerability in the Opera component of Oracle Hospitality OPERA 5 Property Services that can lead to full system takeover over HTTP.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.