Low [CVE-2026-45692] Remote Admin Authorization Bypass in `/config` API via Array Index Normalization
This low-severity Red Hat Linux advisory covers CVE-2026-45692.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
Caddy is an extensible server platform that uses TLS by default. From 2.4.0 until 2.11.3, the authorization layer and the /config traversal layer do not agree on what object the path refers to.
In this case, a path authorized for one config object is accepted, but then resolves to a different config object during traversal. This happens because the authorization layer uses string prefix matching and the /config traversal layer parses array indices numerically using strconv.
Atoi(). This vulnerability is fixed in 2.11.3.
A remote administrator with restricted access to specific configuration objects could bypass these limitations. This discrepancy allows an attacker to read and modify unauthorized configuration elements, undermining the principle of least privilege in remote administration.
This Moderate-impact flaw in Caddy's remote administration API, which allows an authorization bypass due to differing interpretations of array indices, does not affect Red Hat products. The vulnerable code is not present in Red Hat's supported offerings.
Red Hat severity: Moderate — CVSS 3.8 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N). Weakness: CWE-551.
Red Hat lists Red Hat Hardened Images as not affected.
Is CVE-2026-45692 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-45692 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-45692?
Upgrade to a fixed release named by Red Hat:
- 2.11.3
Confirm against the vendor advisory before you patch.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is not required for Red Hat products, as the vulnerable code is not present.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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