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CVE-2026-40968 is an authentication/authorization context handling flaw in Spring gRPC affecting versions 1.0.0 through 1.0.2. When an authenticated user invokes a gRPC method and access is denied, the user's authenticated identity is not properly cleared from the gRPC worker thread. Because the stale security context remains bound to that thread, a subsequent unauthenticated request processed on the same worker thread can inherit the prior user's authenticated identity. This creates a thread-local security context leak across requests and can result in authorization decisions being made using the wrong principal.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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.
4 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
No news coverage yet. Advisories and community discussion only.
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.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.