Login Request a demo
Medium severity · published Mar 25, 2026
CVE-2026-3119
Authenticated query containing a TKEY record may cause named to terminate unexpectedly
6.5
CVSS
0.6%
EPSS
No
On KEV
Description
Under certain conditions, `named` may crash when processing a correctly signed query containing a TKEY record. The affected code can only be reached if an incoming request has a valid transaction signature (TSIG) from a key declared in the `named` configuration. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
B9
BIND 9 · ISC
9.20.0 through 9.20.20; 9.21.0 through 9.21.19; 9.20.9-S1 through 9.20.20-S1 · source: vendor
BI
Bind · Isc
9.20.0 before 9.20.21; 9.21.0 before 9.21.20 · source: NVD
Affected product
B9
BIND 9
ISC
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3119
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3119
Patch
https://downloads.isc.org/isc/bind9/9.20.21
Patch
https://downloads.isc.org/isc/bind9/9.21.20
Vendor Advisory
https://kb.isc.org/docs/cve-2026-3119
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