CVE-2026-41292NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options.
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No exploitation reported and no EPSS estimate yet.
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NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service attack related to parsing long lists of incoming EDNS options. An adversary sending queries with too many EDNS options can hold Unbound threads hostage while they are parsing and creating internal data structures for the options. Coordinated attacks can result in degradation and/or denial of service. Unbound 1.25.1 contains a patch with a fix to limit acceptable incoming EDNS options (100).
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-407, CWE-770, CWE-1050
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Aug 26, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
nlnetlabs unbound nlnetlabs:unbound | before 1.25.1 | NVD |
References
- https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-41292.txtmitigation, vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:24013
- https://access.redhat.com/errata/RHSA-2026:36320
- https://access.redhat.com/errata/RHSA-2026:36777
- https://access.redhat.com/errata/RHSA-2026:37282
- https://access.redhat.com/errata/RHSA-2026:54769
- https://access.redhat.com/security/cve/CVE-2026-41292
- https://bugzilla.redhat.com/show_bug.cgi?id=2480125
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41292.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.