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).
CVE-2026-41292
Score 7.5 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 7.5; sources differ by 0.0.
- High severity, but no confirmed exploitation yet
A fix is available — apply it.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 49(Track)EG Risk 49/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation1% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 1%
- EPSS %ILE
- 51%
- KEV
- Not listed
Published
May 20, 2026
Last Modified
August 25, 2026
Advisory Details (1)
Auto-updated May 20, 2026Vendor Advisories for CVE-2026-41292(7)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:54769Red Hat Product SecurityHigh
Red Hat Security Advisory: OpenShift Container Platform 4.22.10 bug fix and security update
- RHSA-2026:37282Red Hat Product SecurityHigh
Red Hat Security Advisory: unbound security update
- RHSA-2026:36777Red Hat Product SecurityHigh
Red Hat Security Advisory: unbound security update
- RHSA-2026:36320Red Hat Product SecurityHigh
Red Hat Security Advisory: unbound security update
- RHSA-2026:24013Red Hat Product SecurityHigh
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
- CVE-2026-41292Microsoft Security Response Center (MSRC)Medium
Long list of incoming EDNS options degrades performance
- GHSA-2wvj-gvc7-gfhxGitHub Security AdvisoriesMedium
NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to a degradation of service...
Patch Availability(7)
| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | unbound-host (1.5.8-1ubuntu1.1+esm3) @ xenial | 2026-08-25 | ubuntu |
| ubuntu | unbound-host (1.22.0-2ubuntu2.3) @ questing | 2026-08-25 | ubuntu |
| redhat | rhcos-4.22.9.8.202608130832-0 | 2026-08-18 | redhat |
| redhat | unbound-0:1.16.2-5.12.el8_10 | 2026-07-09 | redhat |
| redhat | unbound-0:1.24.2-3.el9_8.2 | 2026-07-08 | redhat |
| redhat | unbound-0:1.24.2-7.el10_2.2 | 2026-07-07 | redhat |
| redhat | unbound-main-1.25.1-2.hum1 | 2026-06-07 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(5 across 5 ecosystems)
Alpine:v3.24(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| unbound | — | 1.25.1-r0 | — |
Debian:11(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| unbound | 1.13.1-1 ... 1.25.2-1 (47 versions) | — | — |
Debian:12(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| unbound | 1.17.1-2 ... 1.25.2-1 (23 versions) | — | — |
Debian:13(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| unbound | 1.22.0-2, 1.22.0-2+deb13u1, 1.22.0-2+deb13u2 | 1.22.0-2+deb13u3 | — |
Debian:14(1)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| unbound | 1.22.0-2 ... 1.25.0-1 (8 versions) | 1.25.1-1 | — |
Weakness Classification(3)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(2)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 27× in last 7d / 121× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
Showing the most recent 100 of 300 total refreshes for this CVE.
- 2026-08-25 13:49 UTCEPSS rescore
- 2026-08-25 12:20 UTCEG score recompute
- 2026-08-25 12:20 UTCVendor advisory
- 2026-08-25 12:20 UTCGHSA enrichment
- 2026-08-24 13:29 UTCVendor advisory
- 2026-08-24 13:29 UTCGHSA enrichment
- 2026-08-24 12:25 UTCEG score recompute
- 2026-08-24 12:25 UTCVendor advisory
- 2026-08-24 12:25 UTCGHSA enrichment
- 2026-08-23 16:57 UTCEG score recompute
- 2026-08-23 16:57 UTCVendor advisory
- 2026-08-23 16:57 UTCGHSA enrichment
- 2026-08-23 00:19 UTCEPSS rescore
- 2026-08-21 23:49 UTCEPSS rescore
- 2026-08-21 22:55 UTCEG score recompute
- 2026-08-21 22:55 UTCVendor advisory
- 2026-08-21 22:55 UTCGHSA enrichment
- 2026-08-20 22:55 UTCEPSS rescore
- 2026-08-20 18:56 UTCEG score recompute
- 2026-08-20 18:56 UTCVendor advisory
- 2026-08-20 18:56 UTCGHSA enrichment
- 2026-08-19 17:03 UTCEPSS rescore
- 2026-08-19 12:27 UTCVendor advisory
- 2026-08-19 12:27 UTCGHSA enrichment
- 2026-08-19 12:11 UTCEG score recompute
Show 75 moreShow fewer
- 2026-08-19 12:11 UTCVendor advisory
- 2026-08-19 12:11 UTCGHSA enrichment
- 2026-08-18 13:48 UTCEPSS rescore
- 2026-08-17 13:47 UTCEPSS rescore
- 2026-08-17 09:54 UTCVendor advisory
- 2026-08-17 09:54 UTCGHSA enrichment
- 2026-08-16 16:55 UTCEG score recompute
- 2026-08-16 16:55 UTCVendor advisory
- 2026-08-16 16:55 UTCGHSA enrichment
- 2026-08-16 14:56 UTCEPSS rescore
- 2026-08-16 03:30 UTCEG score recompute
- 2026-08-16 03:30 UTCVendor advisory
- 2026-08-16 03:30 UTCGHSA enrichment
- 2026-08-16 02:14 UTCEPSS rescore
- 2026-08-15 01:56 UTCEG score recompute
- 2026-08-15 01:56 UTCVendor advisory
- 2026-08-15 01:56 UTCGHSA enrichment
- 2026-08-15 01:30 UTCEPSS rescore
- 2026-08-14 13:59 UTCVendor advisory
- 2026-08-14 13:59 UTCGHSA enrichment
- 2026-08-14 02:02 UTCEG score recompute
- 2026-08-14 02:02 UTCVendor advisory
- 2026-08-14 02:02 UTCGHSA enrichment
- 2026-08-13 22:00 UTCEPSS rescore
- 2026-08-13 02:18 UTCVendor advisory
- 2026-08-13 02:18 UTCGHSA enrichment
- 2026-08-12 14:21 UTCEG score recompute
- 2026-08-12 14:21 UTCVendor advisory
- 2026-08-12 14:21 UTCGHSA enrichment
- 2026-08-12 13:51 UTCEPSS rescore
- 2026-08-12 01:49 UTCVendor advisory
- 2026-08-12 01:49 UTCGHSA enrichment
- 2026-08-11 13:52 UTCEG score recompute
- 2026-08-11 13:52 UTCVendor advisory
- 2026-08-11 13:52 UTCGHSA enrichment
- 2026-08-11 13:43 UTCEPSS rescore
- 2026-08-11 01:32 UTCEG score recompute
- 2026-08-11 01:32 UTCVendor advisory
- 2026-08-11 01:32 UTCGHSA enrichment
- 2026-08-11 00:00 UTCEPSS rescore
- 2026-08-10 13:35 UTCVendor advisory
- 2026-08-10 13:35 UTCGHSA enrichment
- 2026-08-10 01:26 UTCEG score recompute
- 2026-08-10 01:26 UTCVendor advisory
- 2026-08-10 01:26 UTCGHSA enrichment
- 2026-08-09 13:46 UTCEPSS rescore
- 2026-08-09 13:29 UTCVendor advisory
- 2026-08-09 13:29 UTCGHSA enrichment
- 2026-08-09 01:32 UTCEG score recompute
- 2026-08-09 01:32 UTCVendor advisory
- 2026-08-09 01:32 UTCGHSA enrichment
- 2026-08-08 16:37 UTCEPSS rescore
- 2026-08-08 09:08 UTCVendor advisory
- 2026-08-08 09:08 UTCGHSA enrichment
- 2026-08-07 21:11 UTCEG score recompute
- 2026-08-07 21:11 UTCVendor advisory
- 2026-08-07 21:11 UTCGHSA enrichment
- 2026-08-07 09:14 UTCVendor advisory
- 2026-08-07 09:14 UTCGHSA enrichment
- 2026-08-06 21:13 UTCEG score recompute
- 2026-08-06 21:13 UTCVendor advisory
- 2026-08-06 21:13 UTCGHSA enrichment
- 2026-08-06 13:46 UTCEPSS rescore
- 2026-08-06 09:16 UTCVendor advisory
- 2026-08-06 09:16 UTCGHSA enrichment
- 2026-08-05 21:18 UTCEG score recompute
- 2026-08-05 21:18 UTCVendor advisory
- 2026-08-05 21:18 UTCGHSA enrichment
- 2026-08-05 19:17 UTCEPSS rescore
- 2026-08-04 15:10 UTCEPSS rescore
- 2026-08-04 10:38 UTCEPSS rescore
- 2026-08-04 04:52 UTCVendor advisory
- 2026-08-04 04:52 UTCGHSA enrichment
- 2026-08-03 16:54 UTCEG score recompute
- 2026-08-03 16:54 UTCVendor advisory
Frequently asked(5)
What is CVE-2026-41292?
When was CVE-2026-41292 disclosed?
Is CVE-2026-41292 actively exploited?
What is the CVSS score of CVE-2026-41292?
How do I remediate CVE-2026-41292?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-41292
Is Your Infrastructure Affected by CVE-2026-41292?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.