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CVE-2026-42960 is a cache poisoning vulnerability in NLnet Labs Unbound affecting versions up to and including 1.25.0. While following delegation, Unbound can improperly accept and cache promiscuous RRSets placed in the authority section when those records are accompanied by related address records in the additional section. An attacker able to inject such data into a DNS reply can cause Unbound to cache records beyond the intended authority NS context, including other RRSet types such as MX, if the authority RRSet is considered sufficiently trustworthy at that stage of processing, such as in-zone data for the delegation point. The flaw stems from insufficient restriction of additional-section address records to those explicitly relevant to authority NS records, enabling poisoning of the resolver cache through spoofed or fragmentation-assisted responses. The issue is described as a complementary fix to CVE-2025-11411.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
12 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
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Every observed campaign linking this CVE to a named adversary.
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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.