CVSS 3.7 · Low EPSS 0,20%
Kerentanan Operation on a Resource after Expiration or Release pada nlnetlabs unbound. Skor CVSS 3.1 3.7 (Low) menurut nlnetlabs.nl.
In NLnet Labs Unbound 1.16.2 up to and including 1.25.1, a similar vulnerability as with CVE-2026-40622 in the 'ghost domain names' family of attacks was found in Unbound that could extend the ghost domain window by up to one cached TTL configured value for A/AAAA glue records. Similar to other 'ghost domain names' attacks, an adversary needs to control a (ghost) zone and be able to query a vulnerable Unbound. A single client A/AAAA query can cause Unbound to overwrite the cached expired parent-side glue rrset and essentially extend the ghost domain window by up to one cached TTL configured value ('cache-max-ttl'). In configurations where 'harden-referral-path: yes' is used (non-default configuration), no client query is required since Unbound implicitly performs that query. This is a variant of CVE-2026-40622 which only addressed the NS query.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| nlnetlabs | unbound | Versi 1.16.2 hingga sebelum 1.25.2 |