How severe is CVE-2026-45692?

CVE-2026-45692 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2026-45692 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-45692?

CVE-2026-45692 affects Caddyserver Caddy. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-45692?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45692 have an EU (EUVD) identifier?

Yes. CVE-2026-45692 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38559.

When was CVE-2026-45692 published?

CVE-2026-45692 was published on 2026-06-23 and last updated on 2026-06-26.

CVE-2026-45692

CVE-2026-45692 is a medium-severity vulnerability in Caddyserver Caddy with a CVSS 3.x base score of 5.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-187.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-38559
Weakness: CWE-187
Affected product: Caddyserver Caddy
Published: 2026-06-23
Last modified: 2026-06-26

Description

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.

Frequently asked questions

What is CVE-2026-45692?: 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.
How severe is CVE-2026-45692?: CVE-2026-45692 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2026-45692 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-45692?: CVE-2026-45692 affects Caddyserver Caddy. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-45692?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45692 have an EU (EUVD) identifier?: Yes. CVE-2026-45692 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-38559.
When was CVE-2026-45692 published?: CVE-2026-45692 was published on 2026-06-23 and last updated on 2026-06-26.

References

https://github.com/caddyserver/caddy/security/advisories/GHSA-x5w9-xh9r-mvfc

Affected products (1)

cpe:2.3:a:caddyserver:caddy:*:*:*:*:*:*:*:*

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