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110 records

Priority LOW 27

NLnet Labs Unbound 1.12.0 up to and including 1.26.0 has a use-after-free vulnerability when compiled for DNS-over-HTTPs support with '--with-libnghttp2'.

CVSS 3.1MEDIUM 5.9 Network No auth No interaction EPSS 0.00382 Published 2026-09-16 Partial fix · 1.26.1 CWE-416
Priority MEDIUM 40

In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in that can progressively corrupt heap memory and under certain systems and compilation options could lead to remote code execution.

CVSS 4.0HIGH 8.4 Network No auth No interaction EPSS 0.00782 Published 2026-09-16 Partial fix · 1.26.1 CWE-122
Priority MEDIUM 49

In NLnet Labs Unbound up to and including 1.26.0, a vulnerability was found in the DNSSEC validator that enables denial of service and possible remote code execution as a result of digesting DNSKEYs.

CVSS 4.0CRITICAL 9.1 Network No auth No interaction EPSS 0.00962 Published 2026-09-16 Partial fix · 1.26.1 CWE-122
Priority LOW 39

In NLnet Labs Unbound up to and including 1.26.0, a 255 length query name with a large TCP response can lead to a heap buffer overflow during the RRSet canonicalisation routine.

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.0048 Published 2026-09-16 Partial fix · 1.26.1 CWE-122
Priority LOW 29

NLnet Labs Unbound 1.22.0 up to and including 1.26.1, has a use-after-free vulnerability when compiled for DNS-over-QUIC support with '--with-libngtcp2'.

CVSS 3.1MEDIUM 6.5 Network No auth No interaction EPSS 0.0034 Published 2026-09-16 Fixed in 1.26.1 CWE-416
TI-2026-54251 CVE-2026-77955 · GHSA-w62x-5q5r-fgmp

Possible ZONEMD verification bypass window

Priority LOW 20

In NLnet Labs Unbound 1.13.2 up to and including 1.26.1, a vulnerability in ZONEMD configured zones (zonemd-check: yes) which are located below (but not at) a trust anchor allow for an attack window where (tampered with)…

CVSS 3.1MEDIUM 4.4 Network High privileges No interaction EPSS 0.00172 Published 2026-09-16 Partial fix · 1.26.1 CWE-345
Priority LOW 17

In NLnetLabs Unbound 1.20.0 up to and including 1.26.0, a vulnerability on the 'serve-expired' code path can cause a double decrement on the 'wait-limit' counter per client IP essentially bypassing one of the counter mea…

CVSS 3.1LOW 3.7 Network No auth No interaction EPSS 0.00301 Published 2026-09-16 Partial fix · 1.26.1 CWE-675
Priority LOW 36

The BLOCKED access control list items that are evaluated to deny access on the the proxy protocol port can be bypassed completely when connecting over TCP or TLS and sending the query twice on connection that is kept ope…

CVSS 4.0HIGH 8.2 Network No auth No interaction EPSS 0.0044 Published 2026-08-26 Fixed in 4.15.1 CWE-290
Priority LOW 36

Any remote client can crash a (debugging/non-release build type) NSD serve child by sending it a special crafted message with a specially tuned number of DNS Cookie options (17 when UDP payload size is 512).

CVSS 4.0HIGH 8.2 Network No auth No interaction EPSS 0.0046 Published 2026-08-26 Fixed in 4.15.1 CWE-400
Priority LOW 37

Any remote client can crash a NSD serve child, by throttling the TCP receive window after a TCP query.

CVSS 4.0MEDIUM 6.9 Network No auth No interaction EPSS 0.0046 Published 2026-08-26 Fixed in 4.15.1 CWE-191
TI-2026-15293 CVE-2026-18664 · GHSA-fw9f-54cp-j7fc

Wrong interpretation of ACL ranges

Priority LOW 36

When ranges are used for access control (i.e.

CVSS 4.0HIGH 8.2 Network No auth No interaction EPSS 0.00437 Published 2026-08-26 Fixed in 4.15.1 CWE-284
Priority LOW 32

In NLnet Labs Unbound 1.20.0 up to and including 1.25.1, when Unbound is configured with 'serve-expired: yes' and 'serve-expired-client-timeout > discard-timeout > 0' (contrary to the suggested values), the discard-timeo…

CVSS 3.1MEDIUM 5.9 Network No auth No interaction EPSS 0.00365 Published 2026-07-22 Partial fix · 1.25.2 CWE-772
Priority LOW 21

In NLnet Labs Unbound up to and including version 1.25.1, when the validator builds the canonical RDATA form for an RRSIG-covered PX/RP/MINFO/SOA RRset, it computes the address of the second embedded domain name as 'dats…

CVSS 3.1MEDIUM 4.8 Network No auth No interaction EPSS 0.00124 Published 2026-07-22 Partial fix · 1.25.2 CWE-354
Priority LOW 26

In NLnet Labs Unbound 1.22.0 up to and including 1.25.1, a remote unauthenticated client can trigger a libngtcp2 assertion (if compiled with assertions on) and terminate the entire Unbound process using a single DNS-over…

CVSS 3.1MEDIUM 5.9 Network No auth No interaction EPSS 0.00365 Published 2026-07-22 Partial fix · 1.25.2 CWE-195
Priority LOW 26

In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, when the 'dnscrypt:' clause lists more 'dnscrypt-provider-cert:' files than there are matching 'dnscrypt-secret-key:' files, Unbound fills only the matched prefix a…

CVSS 3.1MEDIUM 5.9 Network No auth No interaction EPSS 0.00247 Published 2026-07-22 Partial fix · 1.25.2 CWE-457
Priority LOW 39

In NLnet Labs Unbound 1.23.0 up to and including 1.25.1, when 'dns-error-reporting: yes' is set, the EDNS Report-Channel option (code 18) from the last upstream response is read and uses the option's length as the length…

CVSS 3.1HIGH 7.5 Network No auth No interaction EPSS 0.00281 Published 2026-07-22 Partial fix · 1.25.2 CWE-20
Priority LOW 26

In NLnet Labs Unbound 1.10.0 up to and including 1.25.1, when 'serve-expired: yes' is set together with a 'response-ip: <net> redirect' /'response-ip-data: <net> CNAME <target>' rule (or the RPZ 'rpz-cname-override' equi…

CVSS 3.1MEDIUM 5.9 Network No auth No interaction EPSS 0.00237 Published 2026-07-22 Partial fix · 1.25.2 CWE-476
Priority LOW 14

In NLnet Labs Unbound 1.6.0 up to and including 1.25.1, the 'view_local_data' and 'view_local_datas' commands of 'unbound-control' create a bare local zones tree for an already configured named view when the view is conf…

CVSS 3.1LOW 3.1 Local High privileges User interaction EPSS 0.0016 Published 2026-07-22 Partial fix · 1.25.2 CWE-1188
Priority LOW 17

In NLnet Labs Unbound 1.18.0 up to and including 1.25.1, when Unbound listens on a 'proxy-protocol-port' interface with 'answer-cookie: yes', the RFC 9018 server-cookie SipHash is computed over the proxy's wire address i…

CVSS 3.1LOW 3.7 Network No auth No interaction EPSS 0.00241 Published 2026-07-22 Partial fix · 1.25.2 CWE-290
Priority LOW 32

In NLnet Labs Unbound 1.25.0 up to and including 1.25.1, a fix that makes the 'respip' and 'dns64' modules work together, creates a shallow copy of the view name in effect that could lead to memory corruption if the owne…

CVSS 3.1MEDIUM 5.9 Network No auth No interaction EPSS 0.00365 Published 2026-07-22 Fixed in 1.25.2 CWE-416
Priority LOW 25

In NLnet Labs Unbound 1.4.22 up to and including 1.25.1, UDP source port is randomized and intended to serve as a secret value that increases the entropy of DNS transactions.

CVSS 4.0MEDIUM 5.7 Adjacent network No auth No interaction EPSS 0.00172 Published 2026-07-22 Partial fix · 1.25.2 CWE-349
Priority LOW 30

In NLnet Labs Unbound up to and including version 1.25.1, when 'unwanted-reply-threshold' is enabled (set to any value greater than zero), glue records of 0.0.0.0/::0 can short-circuit Unbound, on systems that can direct…

CVSS 3.1MEDIUM 5.3 Network No auth No interaction EPSS 0.00254 Published 2026-07-22 Partial fix · 1.25.2 CWE-184
Priority LOW 28

In NLnet Labs Unbound 1.7.0 up to and including 1.25.1, when an auth/rpz zone has a configured primary hostname that resolves to BOGUS A/AAAA, it is still considered as a possible XFR endpoint.

CVSS 3.1MEDIUM 6.5 Network No auth No interaction EPSS 0.00134 Published 2026-07-22 Partial fix · 1.25.2 CWE-345
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