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CVE-2026-96888

Named may terminate unexpectedly when a redirect zone is used with strict QNAME minimization

High7.5EPSS 0.46%
Published
Updated
Reserved
Assigned by
isc

Description

A BIND resolver that is configured with both a "redirect" zone and "qname-minimization strict" may abort with an assertion failure while processing the redirect. This issue affects BIND 9 versions 9.16.0 through 9.18.50, 9.20.0 through 9.20.29, 9.21.0 through 9.21.26, 9.16.8-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.29-S1.

Timeline

  1. ID reserved

    By isc

  2. · 28 days later

    Published

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2026-96888, by who scored it
Scored byCVSSScoreVector
iscCNA (assigner)3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVDNVD · Awaiting Analysis3.1High7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS (exploitation in 30 days)
0.46% · top 60% of all CVEs (7 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: yes · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Weakness

Affected products

  • ISC · BIND 9

    • affected 9.16.0 – ≤ 9.18.50
    • affected 9.20.0 – ≤ 9.20.29
    • affected 9.21.0 – ≤ 9.21.26
    • affected 9.16.8-S1 – ≤ 9.18.50-S1
    • affected 9.20.9-S1 – ≤ 9.20.29-S1

What to do

Solution: Upgrade to the patched release most closely related to your current version of BIND 9: 9.20.30, 9.21.27, or 9.20.30-S1.

Workaround: No workarounds known.

Exploitation: We are not aware of any active exploits.

References (3)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .