CVE-2026-41292
â ī¸ highSummary
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 Score
7.5
High
EPSS Score
0.7
Exploit Probability
Published Date
2026-05-20
First Seen: 2026-05-21
đ Relative Risk Intelligence
This CVE is Moderate Risk - more severe than 67.8% of all 365,890 vulnerabilities in our database.
#117,965
Above average severity
Severity Percentile
đ¯ CISA SSVC Assessment Updated: May 20, 2026
đ Exploitation Status
None
No known exploits
âī¸ Automatable
YES
Can be exploited automatically
đĨ Technical Impact
Partial
Limited system impact
đ Discovered By
GitHub user N0zoM1z0
Qifan Zhang (Palo Alto Networks)
SSVC data provided by
CISA
Last Modified
2026-08-26
Source
NVD đ
CVSS Vector 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS Vector 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Red