October 13, 2026

CVE Watchtower

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CVE-2025-6203NVD

Vulnerability Summary

A malicious user may submit a specially-crafted complex payload that otherwise meets the default request size limit which results in excessive memory and CPU consumption of Vault. This may lead to a timeout in Vault’s auditing subroutine, potentially resulting in the Vault server to become unresponsive. This vulnerability, CVE-2025-6203, is fixed in Vault Community Edition 1.20.3 and Vault Enterprise 1.20.3, 1.19.9, 1.18.14, and 1.16.25.
Severity Level
HIGH(7.5)
Published Date
Aug 28, 2025
Last Modified
Sep 26, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.73%Probability
Root Weakness (CWE)
CWE-770: Unknown/Unlisted Weakness ↗
Refer to the official MITRE database for detailed architectural specifications regarding this weakness.
CVSS v3.1 Base Metrics — Score 7.5 (HIGH)
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Hashicorp Vault >= 1.15.0 and < 1.16.27
  • Hashicorp Vault >= 1.15.0 and < 1.21.0
  • Hashicorp Vault >= 1.18.0 and < 1.18.15
  • Hashicorp Vault >= 1.19.0 and < 1.19.11
  • Hashicorp Vault >= 1.20.0 and < 1.20.5
Patched Versions
  • Hashicorp Vault 1.16.27
  • Hashicorp Vault 1.21.0
  • Hashicorp Vault 1.18.15
  • Hashicorp Vault 1.19.11
  • Hashicorp Vault 1.20.5
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🎁7-Day Free Trial — Try Pro or Team, no card required.
📧Email Delivery — Threat intel straight to your inbox.
♾️Unlimited Vendors — Track your entire stack.
🚨All New CVEs — Be the first to know.
📈EPSS Spike Alerts — Catch rising risk before it peaks.
🎯Custom EPSS/CVSS — Filter noise, focus on risk.
🛡️Exploit Intel — A 2nd confirmed-exploit signal beyond KEV.
🐙GitHub Issues — Auto-tracked, no duplicates.
📬Weekly Digest — One clean summary, not inbox spam.
🏷️Watchlist Groups — Tag alerts by team (Infra/AppSec/SOC).
💬Webhooks — Slack & Teams integration.
🔀Smart Routing — Critical alerts to one channel, rest to another.
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External References