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Medium severity5.9NVD Advisory· Published Sep 16, 2026· Updated Sep 17, 2026

CVE-2026-77119

CVE-2026-77119

Description

A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a secure delegation and letting a forged unsigned answer through. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

AI Insight

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

Affected products

3
  • Isc/Bindinferred2 versions
    >=9.11.0,<9.18.51,>=9.20.0,<9.20.28,>=9.21.0,<9.21.26+ 1 more
    • (no CPE)range: >=9.11.0,<9.18.51,>=9.20.0,<9.20.28,>=9.21.0,<9.21.26
    • (no CPE)range: 9.11.0 - 9.18.50, 9.20.0 - 9.20.27, 9.21.0 - 9.21.25, 9.11.3-S1 - 9.18.50-S1, 9.20.9-S1 - 9.20.27-S1
  • osv-coords
    pkg:rpm/opensuse/bind&distro=openSUSE%20Tumbleweed
    Range: < 9.20.29-1.1

Patches

Vulnerability mechanics

References

3

News mentions

2