CVE-2026-1519

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.6%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see: https://kb.isc.org/docs/why-does-my-authoritative-server-make-recursive-queries). This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.46, 9.20.0 through 9.20.20, 9.21.0 through 9.21.19, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.46-S1, and 9.20.9-S1 through 9.20.20-S1.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
49
EG Risk 49/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation1.6% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
1.6%
EPSS %ILE
75th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

March 25, 2026

Last Modified

September 17, 2026

Advisory Details (5)

Auto-updated Jun 12, 2026
Patch available.
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4529-1] bind9 security update

https://lists.debian.org/debian-lts-announce/2026/04/msg00008.html
Web page

CVE-2026-1519: Excessive NSEC3 iterations cause high CPU load during insecure delegation validation

https://kb.isc.org/docs/cve-2026-1519
Web page

Index of /isc/bind9/9.21.20

https://downloads.isc.org/isc/bind9/9.21.20
Web page

Index of /isc/bind9/9.20.21

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

Index of /isc/bind9/9.18.47

https://downloads.isc.org/isc/bind9/9.18.47

Patch Availability(27)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatopenshift/ose-rhel-coreos-9:418.94.202609031320-02026-09-17redhat
ubuntubind9-utils (1:9.20.11-1ubuntu2.2) @ questing2026-09-17ubuntu
redhatopenshift/ose-rhel-coreos-9:416.94.202609011112-02026-09-10redhat
redhatopenshift/ose-rhel-coreos-9:417.94.202608250221-02026-09-03redhat
redhatopenshift/ose-rhel-coreos-9:415.92.202607210244-02026-07-31redhat
redhatopenshift/ose-rhel-coreos-9:413.92.202607141229-02026-07-23redhat
redhatopenshift/ose-rhel-coreos-9:414.92.202607031936-02026-07-20redhat
redhatopenshift/ose-rhel-coreos-8:412.86.202606251120-02026-07-09redhat
redhatopenshift/ose-rhel-coreos-9:4.19.9.6.202606241344-02026-07-02redhat
redhatbind-32:9.16.23-11.el9_2.102026-06-24redhat
redhatbind9.16-32:9.16.23-0.7.el8_6.102026-06-11redhat
redhatbind9.18-32:9.18.29-4.el9_6.32026-06-11redhat
redhatbind-32:9.16.23-18.el9_4.112026-06-11redhat
redhatbind9.16-32:9.16.23-0.14.el8_8.82026-06-10redhat
redhatbind-32:9.18.33-4.el10_0.32026-06-09redhat
redhatbind-32:9.16.23-31.el9_6.32026-06-08redhat
redhatbind-32:9.11.36-3.el8_6.122026-05-11redhat
redhatbind-32:9.11.26-4.el8_4.92026-05-11redhat
redhatbind-32:9.11.36-8.el8_8.92026-05-11redhat
redhatbind-32:9.8.2-0.68.rc1.el6_10.182026-04-28redhat
redhatbind-32:9.11.4-26.P2.el7_9.202026-04-28redhat
redhatbind-32:9.11.36-16.el8_10.72026-04-15redhat
redhatbind-32:9.18.33-10.el10_1.32026-04-15redhat
redhatbind9.16-32:9.16.23-0.22.el8_10.52026-04-14redhat
redhatbind-32:9.16.23-34.el9_7.22026-04-14redhat
redhatbind9.18-32:9.18.29-5.el9_7.42026-04-13redhat
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

(9 across 9 ecosystems)
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
bind—
  • 9.11.0 up to 9.18.47-r0: fixed in 9.18.47-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
bind—
  • 9.11.0 up to 9.18.47-r0: fixed in 9.18.47-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
bind—
  • 9.11.0 up to 9.20.21-r0: fixed in 9.20.21-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
bind—
  • 9.11.0 up to 9.20.21-r0: fixed in 9.20.21-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
bind—
  • 9.11.0 up to 9.20.21-r0: fixed in 9.20.21-r0
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
bind91:9.16.15-1 ... 1:9.16.50-1~deb11u4 (16 versions)
  • every version up to 1:9.16.50-1~deb11u5: fixed in 1:9.16.50-1~deb11u5
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
bind91:9.18.12-1 ... 1:9.18.44-1~deb12u1 (14 versions)
  • every version up to 1:9.18.47-1~deb12u1: fixed in 1:9.18.47-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
bind91:9.20.11-4 ... 1:9.20.20-1~bpo12+1 (12 versions)
  • every version up to 1:9.20.21-1~deb13u1: fixed in 1:9.20.21-1~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
bind91:9.20.11-4 ... 1:9.20.21-1~deb13u1~bpo12+1 (14 versions)
  • every version up to 1:9.20.21-1: fixed in 1:9.20.21-1
—

Weakness Classification(2)

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

Additional Vendor Advisories

(5)

Data Freshness Timeline

(refreshed 11× in last 7d / 31× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 277 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 177 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:31 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  2. 2026-10-18 16:31 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  3. 2026-10-18 05:01 UTCEG score recompute
  4. 2026-10-17 18:16 UTCEG score recompute
  5. 2026-10-17 18:16 UTCVendor advisory
  6. 2026-10-17 18:15 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  7. 2026-10-17 16:33 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  8. 2026-10-16 16:41 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  9. 2026-10-15 16:31 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  10. 2026-10-14 16:32 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  11. 2026-10-13 16:33 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  12. 2026-10-12 16:33 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  13. 2026-10-12 16:32 UTCEG score recompute
  14. 2026-10-11 20:10 UTCEG score recompute
  15. 2026-10-11 17:22 UTCEG score recompute
  16. 2026-10-11 14:55 UTCEG score recompute
  17. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  18. 2026-10-10 19:59 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  19. 2026-10-09 20:06 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  20. 2026-10-08 17:11 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  21. 2026-10-07 23:47 UTCEPSS rescoreEPSS 1.6% · 75th percentile
  22. 2026-10-07 06:24 UTCOSV refresh
  23. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  24. 2026-10-05 17:42 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  25. 2026-10-04 23:21 UTCEPSS rescoreEPSS 1.6% · 74th percentile
Show 75 more
  1. 2026-10-01 19:49 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  2. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  3. 2026-09-29 15:21 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  4. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  5. 2026-09-27 13:47 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  6. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  7. 2026-09-18 19:27 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  8. 2026-09-17 12:19 UTCEG score recompute
  9. 2026-09-17 12:19 UTCVendor advisory
  10. 2026-09-17 12:19 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  11. 2026-09-17 12:11 UTCEG score recompute
  12. 2026-09-17 12:11 UTCVendor advisory
  13. 2026-09-17 12:11 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-09-16 14:07 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  15. 2026-09-16 05:14 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  16. 2026-09-13 16:46 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  17. 2026-09-12 15:00 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  18. 2026-09-11 14:52 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  19. 2026-09-11 09:36 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  20. 2026-09-10 13:22 UTCEG score recompute
  21. 2026-09-10 13:22 UTCVendor advisory
  22. 2026-09-10 13:22 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-09-10 12:28 UTCEG score recompute
  24. 2026-09-10 12:28 UTCVendor advisory
  25. 2026-09-10 12:28 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  26. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  27. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  28. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  29. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  30. 2026-09-04 13:30 UTCEG score recompute
  31. 2026-09-04 13:30 UTCVendor advisory
  32. 2026-09-04 13:30 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  33. 2026-09-04 12:25 UTCEG score recompute
  34. 2026-09-04 12:25 UTCVendor advisory
  35. 2026-09-04 12:24 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  36. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  37. 2026-09-02 14:11 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  38. 2026-09-01 13:53 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  39. 2026-09-01 12:24 UTCEG score recompute
  40. 2026-09-01 12:24 UTCVendor advisory
  41. 2026-09-01 12:23 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  42. 2026-09-01 04:39 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  43. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.6% · 74th percentile
  44. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  45. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  46. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  47. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  48. 2026-08-25 13:48 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  49. 2026-08-25 12:22 UTCEG score recompute
  50. 2026-08-25 12:22 UTCVendor advisory
  51. 2026-08-25 12:22 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  53. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  54. 2026-08-21 12:32 UTCEG score recompute
  55. 2026-08-21 12:32 UTCVendor advisory
  56. 2026-08-21 12:32 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  57. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  58. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  59. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  60. 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  61. 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  62. 2026-08-16 10:23 UTCEG score recompute
  63. 2026-08-16 10:23 UTCVendor advisory
  64. 2026-08-16 10:23 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  65. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  66. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  67. 2026-08-14 19:34 UTCVendor advisory
  68. 2026-08-14 19:34 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  69. 2026-08-14 06:42 UTCEG score recompute
  70. 2026-08-14 06:42 UTCVendor advisory
  71. 2026-08-14 06:42 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5
  72. 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.6% · 73rd percentile
  73. 2026-08-12 20:57 UTCEG score recompute
  74. 2026-08-12 20:57 UTCVendor advisory
  75. 2026-08-12 20:57 UTCGHSA enrichmentGHSA-84m6-p53c-x4wp · GitHub severity HIGH · GitHub CVSS 7.5

Frequently asked(5)

What is CVE-2026-1519?
CVE-2026-1519 is a high-severity vulnerability; its CVE record was published on March 25, 2026. If a BIND resolver is performing DNSSEC validation and encounters a maliciously crafted zone, the resolver may consume excessive CPU. Authoritative-only servers are generally unaffected, although there are circumstances where authoritative servers may make recursive queries (see:…
When was CVE-2026-1519 made public?
CVE-2026-1519 was made public on March 25, 2026: that is the date its CVE record's CNA, Internet Systems Consortium (ISC), gives for when the vulnerability was made public. The CVE record itself was published on March 25, 2026. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
Is CVE-2026-1519 actively exploited?
CVE-2026-1519 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.6% probability of exploitation in the next 30 days (75th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-1519?
CVE-2026-1519 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-1519?
A fix for CVE-2026-1519 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-1519 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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