7.5

CVE-2025-68151: CoreDNS gRPC/HTTPS/HTTP3 servers lack resource limits, enabling DoS via unbounded connections and oversized messages

Analyzed
AliasesCGA-g266-cw62-76jpCGA-h9h5-phmr-hq87CGA-jmvc-27xj-wcwc
Published 08-01-2026Last modified 08-01-2026

Vulnerability summary

CVE-2025-68151 is a high (CVSS 7.5) vulnerability in coredns. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 42.4% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.6, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.49%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 3
OPENSUSE-SU-2026:21483-1SUSE-SU-2026:0142-1CGA-F6C8-358Q-HCM4

Timeline

  1. 08-01-2026
    PublishedVulnerability first disclosed.
  2. 08-01-2026
    Last modifiedVulnerability information updated.

Description

CoreDNS is a DNS server that chains plugins. Prior to version 1.14.0, multiple CoreDNS server implementations (gRPC, HTTPS, and HTTP/3) lack critical resource-limiting controls. An unauthenticated remote attacker can exhaust memory and degrade or crash the server by opening many concurrent connections, streams, or sending oversized request bodies. The issue is similar in nature to CVE-2025-47950 (QUIC DoS) but affects additional server types that do not enforce connection limits, stream limits, or message size constraints. Version 1.14.0 contains a patch.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

42%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.49% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard22 products
  • cloudflared< 2026.2.0-r0
  • cloudflared-fips< 2026.2.0-r0
  • coredns-1.12All versions (No fix recorded)
  • coredns-1.13All versions (No fix recorded)
  • coredns-fips-1.12All versions (No fix recorded)
Wolfi3 products
  • cloudflared< 2026.2.0-r0
  • coredns-1.13All versions (No fix recorded)
  • kuma-coredns-1.13All versions (No fix recorded)
Coredns1 product
Coredns.io1 product
Github.com/coredns1 product
  • coredns< 1.14.0

5 vendors · 28 products

References

6 links