# CVE-2026-1519

## Summary

- **CVE ID:** CVE-2026-1519
- **Severity:** HIGH
- **CVSS Score:** 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
- **CWE:** CWE-606
- **Published:** Mar 25, 2026
- **Last Modified:** Sep 10, 2026

## Description

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.

## Affected Products

- ISC — BIND 9 (9.11.0)
- ISC — BIND 9 (9.18.0)
- ISC — BIND 9 (9.20.0)
- ISC — BIND 9 (9.21.0)
- ISC — BIND 9 (9.11.3-S1)
- ISC — BIND 9 (9.18.11-S1)
- ISC — BIND 9 (9.20.9-S1)

## References

- [CNA](https://kb.isc.org/docs/cve-2026-1519)
- [CNA](https://downloads.isc.org/isc/bind9/9.18.47)
- [CNA](https://downloads.isc.org/isc/bind9/9.20.21)
- [CNA](https://downloads.isc.org/isc/bind9/9.21.20)
- [CVE](https://lists.debian.org/debian-lts-announce/2026/04/msg00008.html)
- [redhat-SADP](https://access.redhat.com/security/cve/CVE-2026-1519)
- [redhat-SADP](https://bugzilla.redhat.com/show_bug.cgi?id=2451305)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1519.json)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:11372)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:11371)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:24851)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8312)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8352)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8155)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:16064)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:16060)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:25171)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:15890)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:25083)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:29110)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:25214)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:24500)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:24934)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:8075)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:7915)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:6935)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:29863)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:34048)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:36610)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:40021)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:43226)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:60019)
- [redhat-SADP](https://access.redhat.com/errata/RHSA-2026:62549)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 1.60%
- **EPSS Percentile:** 74.3

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._