Dashboard / CVE-2026-97206

CVE-2026-97206

HIGH 1 PoC
MEDIUM Priority: 0.03 BB Relevance: 85/100
Published: 2026-10-21 Modified: 2026-10-29 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

NLnet Labs Unbound, 1.22.0 up to and including version 1.26.1, contains a DNS-over-QUIC (DoQ) lifetime bug reachable by a remote DoQ client under multi-threaded operation. A client-triggered QUIC path migration can enter stream/connection cleanup while a mesh reply still retains a pointer to the DoQ stream. Cleanup frees the DoQ stream and when the pending mesh reply later completes it dereferences a stale pointer leading to a crash.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
NLnet Labs Unbound 1.22.0 < 1.26.2

References & Advisories (1)

Proof of Concept (1)

—
https://github.com/suominen/CVE-2026-97206
nomi-sec

Bug Bounty Relevance

85 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction
✓ PoC available (1)

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

0.33%
Raw Score 0.003340
Percentile 26.7%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00334
2026-10-28
0.00334

Intelligence Sources

mitre ref →
nvd ref →

External Links