CVE-2026-93657

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 13.7% of scored records. A rank, not a probability.

NVD base score

8.7 (CVSS v4.0), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/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

NVD analysis status

Deferred. NVD last modified this record on 2026-09-22.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2026-09-18 14:23Z1 MO AGO

Last updated

2026-09-21 20:51Z1 MO AGO

Reserved

2026-09-18

Assigning CNA

VulnCheck

Record state

PUBLISHED

Severity

High (CVSS 8.7)

CNA CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

Weaknesses

• CWE-347Improper Verification of Cryptographic SignatureBase
• CWE-354Improper Validation of Integrity Check ValueBase

Data version

5.2

Document digest

a1786af45924693548d0ef5d5035b6be3108655dde2ad6b46c2116cf66195a97

• github.comGitHub Security Advisory (GHSA-5j98-2g5x-46v6)https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6vendor-advisory
• github.comReturn error from Resolver::lookup() if bogushttps://github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd238patch
• github.comPull Request #3871https://github.com/hickory-dns/hickory-dns/pull/3871patchissue-tracking
• github.comhickory-resolver v0.26.2 Release Noteshttps://github.com/hickory-dns/hickory-dns/releases/tag/v0.26.2release-notes
• github.comhttps://github.com/hickory-dns/hickory-dnsproduct
• www.vulncheck.comVulnCheck Advisory: hickory-resolver before 0.26.2 DNSSEC Validation Bypasshttps://www.vulncheck.com/advisories/hickory-resolver-before-0.26.2-dnssec-validation-bypassthird-party-advisory