SSRF in Microsoft Purview eDiscovery
CVE-2026-26150 is a server-side request forgery vulnerability in Microsoft Purview eDiscovery, a cloud-hosted Microsoft 365 service component used to search and retrieve content across multiple repositories. According to the provided content, an unauthenticated attacker could send a crafted network request to the vulnerable eDiscovery functionality and cause the service to make unintended internal requests due to insufficient validation of the target resource. Because Purview eDiscovery is designed to access data across Microsoft 365 services, successful exploitation could have crossed service boundaries and exposed data that would not normally be accessible to an external unauthenticated user. Microsoft characterizes the issue as an elevation of privilege vulnerability and the supplied CVSS vector indicates changed scope with high confidentiality impact.
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Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A server-side request forgery vulnerability in Microsoft Purview that allows an unauthorized attacker to elevate privileges over a network.
A server-side request forgery vulnerability in Microsoft Purview eDiscovery that could allow unauthenticated access across Microsoft 365 service boundaries and expose sensitive organizational data.
The version that knows your environment.
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.