Dashboard / CVE-2026-123597

CVE-2026-123597

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 73/100
Published: 2026-11-08 Modified: 2026-11-10 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: X
AT: Present
VC: None
VI: None
VA: Low

Description

Hickory DNS hickory-proto 0.25.0-alpha.1 through 0.26.0-alpha.1 and hickory-net before 0.26.2 contain a logic bug in DnssecDnsHandle's DS-fetch path that caches transient DS lookup errors as Bogus DNSSEC validation verdicts. An attacker who induces a SERVFAIL, REFUSED, or timeout response to a child-zone DS sub-query causes the validator to return SERVFAIL for all names under that zone until the cache entry's TTL expires.

Weakness Classification (1)

Affected Software (4)

VendorProductVersion
hickory-dns hickory-dns 0.25.0-alpha.1
hickory-dns hickory-dns 0.26.0-beta.1 < 0.26.2
hickory-dns hickory-dns 0.25.0-alpha.1
hickory-dns hickory-dns 0.26.0-beta.1 < 0.26.2

References & Advisories (2)

Bug Bounty Relevance

73 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

6.3 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.22%
Raw Score 0.002180
Percentile 12.4%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00218
2026-11-12
0.00218
2026-11-10
0.00218
2026-11-09
0.00218
2026-11-08
0.00218

Intelligence Sources

mitre ref →
nvd ref →

External Links