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No exploitation reportedFix availableAwaiting NVD analysis

CVE-2026-77692

No exploitation reported by the sources we read.

  • Published2026-09-16
  • WeaknessCWE-476

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An attacker can cause `named` to abort by sending a crafted DNS-over-HTTPS request with a cryptographically invalid SIG(0) record, and then closing the transport connection prematurely. This issue affects BIND 9 versions 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, and 9.20.9-S1 through 9.20.27-S1.

Timeline

dates in UTC
  1. 2026-09-1614:17CVE publishedNVD

Versions per branch

Products declared by the CNA1 product

As isc, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

  • ISC BIND 9other versions: not affected
    Affected
    • ≥ 9.20.0, ≤ 9.20.27no fix statedcustom
    • ≥ 9.21.0, ≤ 9.21.25no fix statedcustom
    • ≥ 9.20.9-S1, ≤ 9.20.27-S1no fix statedcustom

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-09-16

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • bindWolfiall versions · fixed in 9.20.30-r0and 5 other packages
  • bindSUSE:Linux Enterprise Server for SAP applications 16.0all versions · fixed in 9.20.29-160000.1.1
  • bindSUSE:Linux Enterprise Server 16.0all versions · fixed in 9.20.29-160000.1.1
  • bindSUSE:Linux Enterprise Module for Server Applications 15 SP7all versions · fixed in 9.20.29-150700.3.32.2
  • bindSUSE:Linux Enterprise Module for Basesystem 15 SP7all versions · fixed in 9.20.29-150700.3.32.2
  • bindRed Hat:hummingbird:1all versions · fixed in 32:9.20.29-0.1.hum1and 6 other packages
  • bindopenSUSE:Tumbleweedall versions · fixed in 9.20.29-1.1
  • bindopenSUSE:Leap 16.0all versions · fixed in 9.20.29-160000.1.1

33 more package ranges on OSV.dev

Vendor advisories

  • CVE-2026-77692 Red Hat Product Security15 products fixed

    bind: BIND: Remote Denial of Service via crafted DNS-over-HTTPS request

  • RHSA-2026:68279 Red Hat Product Security15 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Full record on NVD

Fix

  1. Vendor fix Red Hat Product Security RHSA-2026:68279 · 15 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
  2. Workaround from the vendor Red Hat Product Security RHSA-2026:68279 · 15 productsTo mitigate this issue, restrict access to the BIND service to trusted clients only, or disable DNS-over-HTTPS if it is not required. To restrict network access to the BIND service, configure firewall rules to only allow connections from trusted IP ranges to port 53 (UDP and TCP). For example, usin…

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2026-09-16
Last Modified
2026-10-26
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-h634-6r6v-4pg6

Frequently asked questions

What is CVE-2026-77692?

An attacker can cause `named` to abort by sending a crafted DNS-over-HTTPS request with a cryptographically invalid SIG(0) record, and then closing the transport connection prematurely. This issue affects BIND 9 versions 9.20.0 through 9.20.27, 9.21.0 through 9.21.25, and 9.20.9-S1 through 9.20.27-S1.

Is CVE-2026-77692 actively exploited?

Active exploitation of CVE-2026-77692 has not been confirmed. Its EPSS score was 6.6% on 2026-11-12, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-77692?

CVE-2026-77692 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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