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CVE-2026-34834 affects Bulwark Webmail, a self-hosted webmail client for Stalwart Mail Server. In versions prior to 1.4.10, the verifyIdentity() function contained flawed logic that returned true when no session cookies were present. As a result, authentication and identity verification checks could be bypassed. An unauthenticated attacker could exploit this condition against the /api/settings endpoint by supplying arbitrary headers, allowing access to and modification of user settings without a valid authenticated session.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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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.