CVE-2026-3104

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-03-25. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through 9.18.46-S1 are NOT affected.

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 computed
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

March 25, 2026

Last Modified

September 1, 2026

Advisory Details (3)

Auto-updated Jun 10, 2026
No patch confirmed yet.
generic

CVE-2026-3104: Memory leak in code preparing DNSSEC proofs of non-existence

https://kb.isc.org/docs/cve-2026-3104
generic

Index of /isc/bind9/9.21.20

https://downloads.isc.org/isc/bind9/9.21.20
generic

Index of /isc/bind9/9.20.21

https://downloads.isc.org/isc/bind9/9.20.21

Vendor Advisories for CVE-2026-3104(3)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntubind9-utils (1:9.20.11-1ubuntu2.2) @ questing2026-08-21ubuntu
redhatbind-main-9.18.48-1.hum12026-04-07redhat

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:v3.22(1)
PackageVulnerable rangeFixed inDependents
bind—9.20.21-r0—
Alpine:v3.23(1)
PackageVulnerable rangeFixed inDependents
bind—9.20.21-r0—
Alpine:v3.24(1)
PackageVulnerable rangeFixed inDependents
bind—9.20.21-r0—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
bind91:9.20.11-4 ... 1:9.20.21-1~deb13u1~bpo12+1 (13 versions)1:9.20.21-1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
bind91:9.20.11-4 ... 1:9.20.21-1~deb13u1~bpo12+1 (14 versions)1:9.20.21-1—

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(1)

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 8× in last 7d / 36× 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 212 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-3104?
CVE-2026-3104 is a high vulnerability published on March 25, 2026. A specially crafted domain can be used to cause a memory leak in a BIND resolver simply by querying this domain. This issue affects BIND 9 versions 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, and 9.20.9-S1 through 9.20.20-S1. BIND 9 versions 9.18.0 through 9.18.46 and 9.18.11-S1 through…
When was CVE-2026-3104 disclosed?
CVE-2026-3104 was first published in the National Vulnerability Database on March 25, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-3104 actively exploited?
CVE-2026-3104 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 48.4% of all scored CVEs.
What is the CVSS score of CVE-2026-3104?
CVE-2026-3104 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-3104?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-3104, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-3104

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