CVE-2026-52688: RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation

Routine

HIGH 7.5REMOTE

CVE-2026-52688 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.

RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation

Why this priority

High severity
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	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-295, CWE-345
Published	2026-07-23
Last modified	2026-10-24

Publisher (CNA): Open-Xchange

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-07-23 09:16 UTCPublished CVE record published
2026-10-24 13:10 UTCUpdated Record last modified

Exact fixes by distribution

Fedora 46 · sugar-calculator · FIXED · 47-14.fc46 · FEDORA-2026-38eeb9e279 · source

sudo dnf upgrade --advisory=FEDORA-2026-38eeb9e279

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source

sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2

Debian 12 · pdns-recursor · NO FIX YET

Debian 13 · pdns-recursor · FIXED · 5.2.12-0+deb13u1

sudo apt update && sudo apt install --only-upgrade pdns-recursor dpkg --compare-versions "$(dpkg-query -W -f='${Version}' pdns-recursor)" ge "5.2.12-0+deb13u1" && echo PATCHED || echo STILL-VULNERABLE

Alpine 3.24 · pdns-recursor · FIXED · pdns-recursor-5.4.4-r0

apk add --upgrade pdns-recursor apk info -v pdns-recursor

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-2026-52688?

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

Is CVE-2026-52688 being exploited?

CVE-2026-52688 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-2026-52688 affect?

CVE-2026-52688 affects affected software. Severity is high (CVSS 7.5). RRSIGs with too few labels can lead to bypass of DNSSEC wildcard validation

How urgent is CVE-2026-52688?

Priority 33/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs