UN
Product
Unbound
73
CVEs
0
On KEV
10.0
Max CVSS
0
New 30D
Severity mix
Critical 12High 23Medium 25Low 8
Watch
Add Unbound to your stack to get only the CVEs that touch what you run.
| CVE | CVSS | Published | Summary · affected versions |
|---|---|---|---|
| CVE-2026-42960 | 10.0 | May 20 | Possible cache poisoning via promiscuous records for the authority section Affected: before 1.25.1 |
| CVE-2026-82717 | 9.8 | Sep 16 | CNAME synthesis could lead to heap corruption Affected: before 1.26.1 |
| CVE-2026-81642 | 9.8 | Sep 16 | Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY Affected: before 1.26.1 |
| CVE-2026-33278 | 9.8 | May 20 | Possible arbitrary code execution during DNSSEC validation Affected: 1.19.1 before 1.25.1 |
| CVE-2019-25042 | 9.8 | Apr 27 | Unbound before 1.9.5 allows an out-of-bounds write via a compressed name in rdata_copy Affected: before 1.9.5 |
| CVE-2019-25039 | 9.8 | Apr 27 | Unbound before 1.9.5 allows an integer overflow in a size calculation in respip/respip.c Affected: before 1.9.5 |
| CVE-2019-25038 | 9.8 | Apr 27 | Unbound before 1.9.5 allows an integer overflow in a size calculation in dnscrypt/dnscrypt.c Affected: before 1.9.5 |
| CVE-2019-25035 | 9.8 | Apr 27 | Unbound before 1.9.5 allows an out-of-bounds write in sldns_bget_token_par Affected: before 1.9.5 |
| CVE-2019-25034 | 9.8 | Apr 27 | Unbound before 1.9.5 allows an integer overflow in sldns_str2wire_dname_buf_origin, leading to an out-of-bounds write Affected: before 1.9.5 |
| CVE-2019-25033 | 9.8 | Apr 27 | Unbound before 1.9.5 allows an integer overflow in the regional allocator via the ALIGN_UP macro Affected: before 1.9.5 |
| CVE-2019-25032 | 9.8 | Apr 27 | Unbound before 1.9.5 allows an integer overflow in the regional allocator via regional_alloc Affected: before 1.9.5 |
| CVE-2026-50252 | 9.3 | Jul 22 | Possible cache poisoning attack by mapping source port population per thread Affected: 1.4.22 before 1.25.2 |
| CVE-2026-85501 | 7.5 | Sep 16 | Retrap: Novel Vulnerabilities to launch Algorithmic Complexity Attacks on DNSSEC Affected: before 1.26.1 |
| CVE-2026-81634 | 7.5 | Sep 16 | Possible heap buffer overflow during DNSSEC canonicalization Affected: before 1.26.1 |
| CVE-2026-80225 | 7.5 | Sep 16 | Possible degradation of service from continuous queries on the same TCP/DoT connection Affected: before 1.26.1 |
| CVE-2026-55973 | 7.5 | Jul 22 | 'dns-error-reporting: yes' leads to stack buffer overflow Affected: 1.23.0 before 1.25.2 |
| CVE-2026-44690 | 7.5 | Jul 22 | Cross-zone wildcard cache poisoning via RRSIG.labels manipulation Affected: 1.7.0 before 1.25.2 |
| CVE-2026-40691 | 7.5 | Jul 22 | Packet of death for DNSCrypt over TCP Affected: 1.9.0 before 1.25.2 |
| CVE-2026-32665 | 7.5 | Jul 22 | Remote DNS-over-QUIC denial of service due to `quic-size` budget bypass Affected: 1.22.0 before 1.25.2 |
| CVE-2026-42959 | 7.5 | May 20 | Crash during DNSSEC validation of malicious content Affected: before 1.25.1 |
| CVE-2026-42944 | 7.5 | May 20 | Heap overflow with multiple NSID, COOKIE, PADDING EDNS options Affected: 1.14.0 before 1.25.1 |
| CVE-2026-41292 | 7.5 | May 20 | Long list of incoming EDNS options degrades performance Affected: before 1.25.1 |
| CVE-2026-40622 | 7.5 | May 20 | Another 'ghost domain names' attack variant Affected: 1.16.2 before 1.25.1 |
| CVE-2024-1931 | 7.5 | Mar 7 | NLnet Labs Unbound version 1.18.0 up to and including version 1.19.1 contain a vulnerability that can cause denial of service by a certain code path that can lead to an infinite… Affected: 1.18.0 before 1.19.2 |
| CVE-2023-50387 | 7.5 | Feb 14 | Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related RFCs) allow remote attackers to cause a denial of service (CPU consumption) via one or more… Affected: before 1.19.1 |
| CVE-2022-3204 | 7.5 | Sep 26 | A vulnerability named 'Non-Responsive Delegation Attack' (NRDelegation Attack) has been discovered in various DNS resolving software Affected: through 1.16.2 |
| CVE-2019-25041 | 7.5 | Apr 27 | Unbound before 1.9.5 allows an assertion failure via a compressed name in dname_pkt_copy Affected: before 1.9.5 |
| CVE-2019-25040 | 7.5 | Apr 27 | Unbound before 1.9.5 allows an infinite loop via a compressed name in dname_pkt_copy Affected: before 1.9.5 |
| CVE-2019-25037 | 7.5 | Apr 27 | Unbound before 1.9.5 allows an assertion failure and denial of service in dname_pkt_copy via an invalid packet Affected: before 1.9.5 |
| CVE-2019-25036 | 7.5 | Apr 27 | Unbound before 1.9.5 allows an assertion failure and denial of service in synth_cname Affected: before 1.9.5 |
| CVE-2020-10772 | 7.5 | Nov 27 | An incomplete fix for CVE-2020-12662 was shipped for Unbound in Red Hat Enterprise Linux 7, as part of erratum RHSA-2020:2414 Affected: 1.6.6-5 |
| CVE-2020-12663 | 7.5 | May 19 | Unbound before 1.10.1 has an infinite loop via malformed DNS answers received from upstream servers Affected: before 1.10.1 |
| CVE-2020-12662 | 7.5 | May 19 | Unbound before 1.10.1 has Insufficient Control of Network Message Volume, aka an "NXNSAttack" issue Affected: before 1.10.1 |
| CVE-2019-16866 | 7.5 | Oct 3 | Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query Affected: before 1.9.4 |
| CVE-2019-18934 | 7.3 | Nov 19 | Unbound 1.6.4 through 1.9.4 contain a vulnerability in the ipsec module that can cause shell code execution after receiving a specially crafted answer Affected: 1.6.4 through 1.9.4 |
| CVE-2026-78227 | 6.5 | Sep 16 | Use-after-free in DoQ stream output buffer on reset re-transmission Affected: 1.22.0 before 1.26.1 |
| CVE-2026-50248 | 6.5 | Jul 22 | BOGUS configured primary hostname accepted for XFR in auth/rpz zones Affected: 1.7.0 before 1.25.2 |
| CVE-2022-30699 | 6.5 | Aug 1 | Novel "ghost domain names" attack by updating almost expired delegation information Affected: before 1.16.2 |
| CVE-2022-30698 | 6.5 | Aug 1 | Novel "ghost domain names" attack by introducing subdomain delegations Affected: before 1.16.2 |
| CVE-2026-82720 | 5.9 | Sep 16 | Use-after-free in DoH stream cleanup code path Affected: 1.12.0 before 1.26.1 |
| CVE-2026-56444 | 5.9 | Jul 22 | Degradation of resolution service when 'discard-timeout' and 'serve-expired-client-timeout' are combined in unusual configuration Affected: 1.20.0 before 1.25.2 |
| CVE-2026-55991 | 5.9 | Jul 22 | Remote DNS-over-QUIC (DoQ) flow-control assertion failure in libngtcp2 Affected: 1.22.0 before 1.25.2 |
| CVE-2026-55990 | 5.9 | Jul 22 | Packet of death for a DNSCrypt misconfigured Unbound Affected: 1.7.0 before 1.25.2 |
| CVE-2026-55717 | 5.9 | Jul 22 | 'serve-expired-client-timeout' and 'response-ip' CNAME redirect could lead to a crash Affected: 1.10.0 before 1.25.2 |
| CVE-2026-52863 | 5.9 | Jul 22 | Memory corruption could lead to crash and denial of service Affected: 1.25.0 before 1.25.2 |
| CVE-2026-50046 | 5.9 | Jul 22 | Possible heap use-after-free in an error path when a DoT forwarded query is jostled out Affected: 1.15.0 before 1.25.2 |
| CVE-2026-44621 | 5.9 | Jul 22 | Libunbound applications configured with 'unwanted-reply-threshold' could eventually be abruptly terminated Affected: before 1.25.2 |
| CVE-2026-44608 | 5.9 | May 20 | Use after free and crash under special conditions in RPZ code Affected: 1.14.0 before 1.25.1 |
| CVE-2019-25031 | 5.9 | Apr 27 | Unbound before 1.9.5 allows configuration injection in create_unbound_ad_servers.sh upon a successful man-in-the-middle attack against a cleartext HTTP session Affected: before 1.9.5 |
| CVE-2020-28935 | 5.5 | Dec 7 | NLnet Labs Unbound, up to and including version 1.12.0, and NLnet Labs NSD, up to and including version 4.3.3, contain a local vulnerability that would allow for a local symlink… Affected: before 1.13.0 |
