CVE-2026-42960

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

A fix is available — apply it.

NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to poisoning via promiscuous records for the authority section. Promiscuous RRSets that complement DNS replies in the authority section can be used to trick Unbound to cache such records. If an adversary is able to attach such records in a reply (i.e., spoofed packet, fragmentation attack) he would be able to poison Unbound's cache. A malicious actor can exploit the possible poisonous effect by injecting RRSets other than NS that are also accompanied by address records in a reply, for example MX. This could be achieved by trying to spoof a reply packet or fragmentation attacks. Unbound would then accept the relative address records in the additional section and cache them if the authority RRSet has enough trust at this point, i.e., in-zone data for the delegation point. Unbound 1.25.1 contains a patch with a fix that disregards address records from the additional section if they are not explicitly relevant only to authority NS records, mitigating the possible poison effect. This is a complement fix to CVE-2025-11411.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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 computed
Severity100% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

May 20, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated Jul 24, 2026
No patch confirmed yet.
generic
https://www.nlnetlabs.nl/downloads/unbound/CVE-2026-42960.txt

Vendor Advisories for CVE-2026-42960(3)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuunbound-host (1.6.7-1ubuntu2.6+esm4) @ bionic2026-07-26ubuntu
ubuntuunbound-host (1.19.2-1ubuntu3.8) @ noble2026-07-26ubuntu
redhatunbound-main-1.25.1-1.hum12026-05-23redhat

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.

Weakness Classification(1)

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 12× in last 7d / 49× 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 305 total refreshes for this CVE.

  1. 2026-07-27 14:13 UTCEPSS rescore
  2. 2026-07-26 14:54 UTCEPSS rescore
  3. 2026-07-26 14:54 UTCEPSS rescore
  4. 2026-07-26 08:15 UTCEG score recompute
  5. 2026-07-26 08:15 UTCVendor advisory
  6. 2026-07-26 08:15 UTCGHSA enrichment
  7. 2026-07-25 14:18 UTCEPSS rescore
  8. 2026-07-24 14:17 UTCEPSS rescore
  9. 2026-07-23 14:18 UTCEPSS rescore
  10. 2026-07-23 03:12 UTCEG score recompute
  11. 2026-07-22 14:08 UTCEPSS rescore
  12. 2026-07-21 15:24 UTCEPSS rescore
  13. 2026-07-20 17:08 UTCEPSS rescore
  14. 2026-07-19 14:31 UTCEPSS rescore
  15. 2026-07-19 02:29 UTCEPSS rescore
  16. 2026-07-18 10:04 UTCEPSS rescore
  17. 2026-07-17 22:59 UTCOSV refresh
  18. 2026-07-16 17:03 UTCEPSS rescore
  19. 2026-07-15 16:57 UTCEPSS rescore
  20. 2026-07-15 02:00 UTCEPSS rescore
  21. 2026-07-13 22:30 UTCEPSS rescore
  22. 2026-07-13 06:13 UTCEPSS rescore
  23. 2026-07-12 05:46 UTCEPSS rescore
  24. 2026-07-11 08:27 UTCEPSS rescore
  25. 2026-07-09 19:10 UTCEPSS rescore
Show 75 more
  1. 2026-07-08 15:16 UTCEPSS rescore
  2. 2026-07-07 13:46 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-06 02:23 UTCEPSS rescore
  6. 2026-07-05 02:30 UTCEPSS rescore
  7. 2026-07-04 06:31 UTCEPSS rescore
  8. 2026-07-01 15:06 UTCEPSS rescore
  9. 2026-06-30 23:22 UTCEPSS rescore
  10. 2026-06-29 20:30 UTCVendor advisory
  11. 2026-06-29 20:30 UTCGHSA enrichment
  12. 2026-06-29 14:06 UTCEPSS rescore
  13. 2026-06-28 14:07 UTCEPSS rescore
  14. 2026-06-28 13:02 UTCVendor advisory
  15. 2026-06-28 13:02 UTCGHSA enrichment
  16. 2026-06-28 08:57 UTCVendor advisory
  17. 2026-06-28 08:57 UTCGHSA enrichment
  18. 2026-06-28 04:56 UTCEPSS rescore
  19. 2026-06-28 04:54 UTCVendor advisory
  20. 2026-06-28 04:54 UTCGHSA enrichment
  21. 2026-06-28 00:49 UTCVendor advisory
  22. 2026-06-28 00:49 UTCGHSA enrichment
  23. 2026-06-27 20:16 UTCVendor advisory
  24. 2026-06-27 20:16 UTCGHSA enrichment
  25. 2026-06-27 12:22 UTCVendor advisory
  26. 2026-06-27 12:22 UTCGHSA enrichment
  27. 2026-06-27 07:26 UTCVendor advisory
  28. 2026-06-27 07:26 UTCGHSA enrichment
  29. 2026-06-27 03:08 UTCEPSS rescore
  30. 2026-06-26 19:35 UTCVendor advisory
  31. 2026-06-26 19:35 UTCGHSA enrichment
  32. 2026-06-26 03:48 UTCVendor advisory
  33. 2026-06-26 03:48 UTCGHSA enrichment
  34. 2026-06-25 20:19 UTCVendor advisory
  35. 2026-06-25 20:19 UTCGHSA enrichment
  36. 2026-06-25 16:09 UTCVendor advisory
  37. 2026-06-25 16:08 UTCGHSA enrichment
  38. 2026-06-25 13:49 UTCEPSS rescore
  39. 2026-06-25 13:49 UTCEPSS rescore
  40. 2026-06-24 14:05 UTCEPSS rescore
  41. 2026-06-23 21:33 UTCEPSS rescore
  42. 2026-06-22 14:25 UTCEPSS rescore
  43. 2026-06-22 14:25 UTCEPSS rescore
  44. 2026-06-21 14:56 UTCEPSS rescore
  45. 2026-06-21 14:56 UTCEPSS rescore
  46. 2026-06-21 01:59 UTCEPSS rescore
  47. 2026-06-19 19:25 UTCEPSS rescore
  48. 2026-06-18 17:52 UTCEPSS rescore
  49. 2026-06-18 17:52 UTCEPSS rescore
  50. 2026-06-18 02:02 UTCVendor advisory
  51. 2026-06-18 02:02 UTCGHSA enrichment
  52. 2026-06-17 20:03 UTCVendor advisory
  53. 2026-06-17 20:03 UTCGHSA enrichment
  54. 2026-06-17 17:53 UTCEPSS rescore
  55. 2026-06-17 15:34 UTCVendor advisory
  56. 2026-06-17 15:34 UTCGHSA enrichment
  57. 2026-06-17 11:26 UTCVendor advisory
  58. 2026-06-17 11:26 UTCGHSA enrichment
  59. 2026-06-17 04:24 UTCVendor advisory
  60. 2026-06-17 04:24 UTCGHSA enrichment
  61. 2026-06-17 00:20 UTCVendor advisory
  62. 2026-06-17 00:20 UTCGHSA enrichment
  63. 2026-06-16 20:15 UTCVendor advisory
  64. 2026-06-16 20:15 UTCGHSA enrichment
  65. 2026-06-16 17:52 UTCEPSS rescore
  66. 2026-06-16 11:06 UTCVendor advisory
  67. 2026-06-16 11:06 UTCGHSA enrichment
  68. 2026-06-16 07:02 UTCVendor advisory
  69. 2026-06-16 07:02 UTCGHSA enrichment
  70. 2026-06-16 02:59 UTCVendor advisory
  71. 2026-06-16 02:59 UTCGHSA enrichment
  72. 2026-06-15 22:55 UTCVendor advisory
  73. 2026-06-15 22:55 UTCGHSA enrichment
  74. 2026-06-15 17:49 UTCEPSS rescore
  75. 2026-06-15 15:51 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-42960?
CVE-2026-42960 is a critical vulnerability published on May 20, 2026. NLnet Labs Unbound up to and including version 1.25.0 is vulnerable to poisoning via promiscuous records for the authority section. Promiscuous RRSets that complement DNS replies in the authority section can be used to trick Unbound to cache such records. If an adversary is able to attach such…
When was CVE-2026-42960 disclosed?
CVE-2026-42960 was first published in the National Vulnerability Database on May 20, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42960 actively exploited?
CVE-2026-42960 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 83.7% of all scored CVEs.
What is the CVSS score of CVE-2026-42960?
CVE-2026-42960 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-42960?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42960, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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