VulertSecurity VulertSecurity

Vulnerability Database · Debian · unbound · Version

unbound 1.26.1-1

1.26.1-1 is affected by 14 vulnerabilities.

The vulnerabilities that cover this exact version are listed below with the fixed version to move to.

Critical 0 High 1 Medium 5 Low 1 Unrated 7

All unbound versions & vulnerabilities → Search the database for this package →
Database updated 23/Oct/2026

Concerned about your application's security?

Vulert continues monitoring your dependencies and alerts you when new vulnerabilities are disclosed. No installation and no source-code access required.

01 Vulnerabilities affecting this version

unbound 1.26.1-1 vulnerabilities

14 vulnerabilities cover unbound 1.26.1-1. Scroll the table for all of them, or open the full list in the database.

Vulnerability Severity Fixed version Disclosed
Heap Buffer Overflow in Unbound Package Due to Query Name Length 7.5 high No fix published 16 Sep 2026
Use-After-Free Vulnerability in Unbound DNS Resolver (CVE-2026-78227) 6.5 medium No fix published 16 Sep 2026
Use-After-Free Vulnerability in Unbound Package (CVE-2026-82720) 5.9 medium No fix published 16 Sep 2026
Denial of Service Vulnerability in Unbound Package 5.3 medium No fix published 16 Sep 2026
Algorithmic Complexity Attacks in Unbound DNSSEC - CVE-2026-85501 5.3 medium No fix published 16 Sep 2026
Integrity Check Bypass in Unbound Package Vulnerability 4.4 medium No fix published 16 Sep 2026
Unbound DNS Server Vulnerability: Double Decrement Attack on 'serve-expired' Path 3.7 low No fix published 16 Sep 2026
Unbound Package Vulnerability: Insecure Trust Anchor Handling N/A unrated No fix published 21 Oct 2026
Critical DNS-over-QUIC Lifetime Bug in Unbound Package N/A unrated No fix published 21 Oct 2026
Cache-Level Side-Channel Vulnerability in Unbound DNS Resolver N/A unrated No fix published 21 Oct 2026
Performance Degradation Vulnerability in Unbound DNS Resolver N/A unrated No fix published 21 Oct 2026
Unbound DNSSEC Vulnerability: Insecure Trust Island Handling in Unbound Package N/A unrated No fix published 21 Oct 2026
Critical Vulnerability in Unbound DNSSEC Validator Leading to DoS and Remote Code Execution N/A unrated No fix published 16 Sep 2026
Critical Heap Memory Corruption Vulnerability in Unbound Package N/A unrated No fix published 16 Sep 2026

Looking for another version, or everything Vulert holds for unbound?

All versions → Full vulnerability list →

Subscribe to Vulert on Telegram
Daily digest of new CVEs, critical and high severity, affected packages and fixes — plus a weekly roundup.
Join the channel →

Questions

About unbound 1.26.1-1

Is unbound 1.26.1-1 vulnerable?

Yes. 14 vulnerabilities in the Vulert database cover unbound 1.26.1-1: 0 critical, 1 high, 5 medium and 1 low, plus 7 not yet rated. Each entry above names the fixed version to move to.

How do I monitor unbound for upcoming vulnerabilities?

Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the unbound version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.