Answer in brief
CVE-2026-26017 records a High severity (CVSS 7.7) vulnerability in CoreDNS ACL Bypass. The current sources do not mark it as known exploited. The current feed maps coredns/coredns (generic), github.com/coredns/coredns (go). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps coredns/coredns (generic), github.com/coredns/coredns (go). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| coredns/corednsgeneric | < 1.14.2 | Not reported |
| github.com/coredns/corednsgo | >=0 <1.14.2 | 1.14.2 |
Published upstream
Mar 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 9, 2026
CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, a logical vulnerability in CoreDNS allows DNS access controls to be bypassed due to the default execution order of plugins. Security plugins such as acl are evaluated before the rewrite plugin, resulting in a Time-of-Check Time-of-Use (TOCTOU) flaw. This issue has been patched in version 1.14.2.
Quoted source text, attributed separately from HOL analysis.