CVE-2026-77692: An attacker can cause `named` to abort by sending a crafted DNS-over-HTTPS request with a cryptographically in

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HIGH 7.5REMOTE

CVE-2026-77692 is a high-severity flaw (CVSS 7.5) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
EPSS top 6%: very likely to be exploited
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	6.6% (top 6%)
CISA exploited list	No
Weakness	CWE-476
Published	2026-09-16
Last modified	2026-10-26

Publisher (CNA): Internet Systems Consortium (ISC)

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-09-16 14:17 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · gcl · FIXED · 2.7.1-12.fc46 · FEDORA-2026-ff383a759b · source

sudo dnf upgrade --advisory=FEDORA-2026-ff383a759b

Fedora ELN · mozjs140 · FIXED · 140.13.0-5.eln159 · FEDORA-2026-f7ed0026e0 · source

sudo dnf upgrade --advisory=FEDORA-2026-f7ed0026e0

Debian 12 · bind9 · NO FIX YET

Debian 13 · bind9 · FIXED · 1:9.20.29-1~deb13u1

sudo apt update && sudo apt install --only-upgrade bind9 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' bind9)" ge "1:9.20.29-1~deb13u1" && echo PATCHED || echo STILL-VULNERABLE

RHEL 10 · bind · NOT AFFECTED

RHEL 6 · bind · NOT AFFECTED

RHEL 7 · bind · NOT AFFECTED

RHEL 8 · bind · NOT AFFECTED

RHEL 8 · bind9.16 · NOT AFFECTED

Alpine 3.22 · bind · FIXED · bind-9.20.29-r0

apk add --upgrade bind apk info -v bind

Alpine 3.23 · bind · FIXED · bind-9.20.29-r0

apk add --upgrade bind apk info -v bind

Alpine 3.24 · bind · FIXED · bind-9.20.29-r0

apk add --upgrade bind apk info -v bind

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-77692?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-77692 being exploited?

CVE-2026-77692 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-77692 affect?

CVE-2026-77692 affects affected software. Severity is high (CVSS 7.5). 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

How urgent is CVE-2026-77692?

Priority 55/100. High severity; EPSS top 6%: very likely to be exploited; Remotely exploitable, no login, no user action

Software pages

BIND DNS vulnerabilities

References

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