5.9

CVE-2026-77119: isc bind 9 Origin Validation Error

CVSS: 5.9v3.1MediumAwaiting analysis
AliasesALPINE-CVE-2026-77119UBUNTU-CVE-2026-77119DEBIAN-CVE-2026-77119
Published 16-09-2026Last modified 17-09-2026
Open JSON

Vulnerability summary

CVE-2026-77119 is a medium (CVSS 5.9) Origin Validation Error vulnerability in isc bind 9. EPSS estimates a 0.23% chance of exploitation in the next 30 days, higher than 12.4% of scored vulnerabilities.

Overall risk
24/100
0100
Low · default modelHow is this calculated?
CVSS score
5.9/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.23%
0%100%
Low · +0.04 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 5
MGASA-2026-0422OPENSUSE-SU-2026:11916-1RHSA-2026:68279SUSE-SU-2026:24157-1SUSE-SU-2026:4285-1SUSE-SU-2026:4664-1

Timeline

  1. 16-09-2026
    PublishedVulnerability first disclosed.
  2. 17-09-2026
    Last modifiedVulnerability information updated.

Description

A validly signed NSEC3 from an unrelated sibling zone may be accepted as an insecurity proof, downgrading a secure delegation and letting a forged unsigned answer through. This issue affects BIND 9 versions 9.11.0 through 9.18.50, 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, 9.11.3-S1 through 9.18.50-S1, and 9.20.9-S1 through 9.20.27-S1.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.23%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

+0.04 pp

From 0.19% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.23%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu3 products
  • bind9All versions (No fix recorded) | < 1:9.9.5.dfsg-3ubuntu0.19+esm15 | < 1:9.10.3.dfsg.P4-8ubuntu1.19+esm11 | < 1:9.11.3+dfsg-1ubuntu1.19+esm6 | < 1:9.18.30-0ubuntu0.20.04.2+esm3 | < 1:9.18.39-0ubuntu0.22.04.7 | < 1:9.18.39-0ubuntu0.24.04.8 | < 1:9.20.24-1ubuntu0.4
  • bind9-libsAll versions (No fix recorded)
  • isc-dhcpAll versions (No fix recorded)
Alpine1 product
  • bind< 9.20.29-r0
Debian1 product
  • bind9All versions (No fix recorded) | < 1:9.20.29-1~deb13u1 | < 1:9.20.29-1
Isc1 product
  • bind 9≥ 9.11.0, ≤ 9.18.50 | ≥ 9.20.0, ≤ 9.20.27 | ≥ 9.21.0, ≤ 9.21.25 | ≥ 9.11.3-S1, ≤ 9.18.50-S1 | ≥ 9.20.9-S1, ≤ 9.20.27-S1

4 vendors · 6 products

References

8 links