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Medium severity6.5NVD Advisory· Published Jul 23, 2026· Updated Jul 30, 2026

CVE-2026-39155

CVE-2026-39155

Description

Knot DNS before 3.4.10 and 3.5.x before 3.5.4 contains a vulnerability in mod-onlinesign where the next NSEC owner name can be computed incorrectly. This can create an overly broad authenticated denial interval, allowing downstream validating resolvers using aggressive negative caching to synthesize negative answers for legitimate names and causing resolver-side denial of service.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

2
  • Knot DNS/Knot DNSllm-fuzzy2 versions
    <3.4.10, <3.5.4+ 1 more
    • (no CPE)range: <3.4.10, <3.5.4
    • (no CPE)range: <3.5.4

Patches

Vulnerability mechanics

References

2

News mentions

0

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