Dnsmasq: dnsmasq: out-of-bailiwick cache injection through cname chase in split-dns configurations
Historical advisory recorded 29 Oct 2026 14:12:12 UTC. Read the latest advisory.
cve-program · CVE-2026-93008
PublishedA flaw was found in dnsmasq. When following a CNAME in a DNS response, the resolver can cache records for the CNAME target without checking that those records belong to the responding server's authorized zone. In split-DNS deployments that send some domains to a specific upstream, an attacker who controls that upstream can inject cache entries for unrelated names. Later clients may then receive attacker-chosen addresses for those names.
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cve-program · CVE-2026-93008
PublishedDnsmasq: dnsmasq: out-of-bailiwick cache injection through cname chase in split-dns configurations
A flaw was found in dnsmasq. When following a CNAME in a DNS response, the resolver can cache records for the CNAME target without checking that those records belong to the responding server's authorized zone. In split-DNS deployments that send some domains to a specific upstream, an attacker who controls that upstream can inject cache entries for unrelated names. Later clients may then receive attacker-chosen addresses for those names.
- Source published
- 29 Oct 2026 12:33:22 UTC
- Source modified
- 29 Oct 2026 12:33:22 UTC
- Saved here
- 29 Oct 2026 14:12:12 UTC
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- CVE Program Terms of Use
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CVSS 3.1 · 6.8 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N