A HIGH-severity vulnerability identified as CVE-2026-26205 has been published on February 19, 2026 with a CVSS base score of 7.1. This security advisory provides a detailed breakdown of the vulnerability, its potential impact, weakness classification, and actionable steps to protect your systems.
Vulnerability Details
CVE ID: CVE-2026-26205
Severity: HIGH
CVSS Score: 7.1
Published: February 19, 2026
Weakness (CWE): CWE-863
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | None |
Technical Description
opa-envoy-plugun is a plugin to enforce OPA policies with Envoy. Versions prior to 1.13.2-envoy-2 have a vulnerability in how the `input.parsed_path` field is constructed. HTTP request paths are treated as full URIs when parsed; interpreting leading path segments prefixed with double slashes (`//`) as authority components, and therefore dropping them from the parsed path. This creates a path interpretation mismatch between authorization policies and backend servers, enabling attackers to bypass access controls by crafting requests where the authorization filter evaluates a different path than the one ultimately served. Version 1.13.2-envoy-2 fixes the issue.
Potential Impact
If exploited, this high-severity vulnerability could allow an attacker to cause significant damage to affected systems. Organizations running affected software should treat this as a priority remediation item.
Recommended Action
No official patch is available yet. Until one is released:
- Monitor the official NVD page and vendor channels for patch announcements.
- Restrict access to the affected system or service where possible.
- Apply network-level mitigations such as firewall rules or WAF policies.
- Enable logging and alerting for anomalous activity related to this vulnerability.
- Review your incident response plan in case of active exploitation.
References
Related Security Advisories
- [HIGH] CVE-2026-27464 — CVSS 7.7 (February 21, 2026) — HIGH / CVSS 7.7
- [HIGH] CVE-2026-27466 — CVSS 7.2 (February 21, 2026) — HIGH / CVSS 7.2
- [HIGH] CVE-2026-26050 — CVSS 7.8 (February 20, 2026) — HIGH / CVSS 7.8
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