# CVE-2025-26787: An error in the SignServer container startup logic was found in Keyfactor SignServer versions prior to 7.2. The Admin…

Source: https://junglewise.ai/threats/cve-2025-26787-an-error-in-the-signserver-container-startup-logic-was-found-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-12-22  
License: CC BY 4.0 with a link back

CVE-2025-26787 · Severity: medium · CVSS 4.7 · Published 2025-12-22

An error in the SignServer container startup logic was found in Keyfactor SignServer versions prior to 7.2. The Admin CLI command used to configure Certificate access to the initial startup of the container sets a property of "allowany" to allow any user with a valid and trusted client auth certificate to connect. Admins can then set more restricted access to specific certificates. A logic error caused this admin CLI command to be run on each restart of the container instead of only the first startup as intended resetting the configuration to "allowany".

Technologies: [Keyfactor SignServer](https://junglewise.ai/threats/technologies/signserver). Vendors: [Keyfactor](https://junglewise.ai/threats/vendors/keyfactor).

## Quick answers

**Is CVE-2025-26787 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-26787 being exploited in the wild.

**How severe is CVE-2025-26787?** Medium severity, with a CVSS score of 4.7, published 22 December 2025.

**Which products and versions are affected?** Keyfactor SignServer. The advisory does not name versions.

**Is there a fix for CVE-2025-26787?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2025-26787?** Check whether you run Keyfactor SignServer. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Keyfactor SignServer

## Related threats

- [Keyfactor SignServer local file enumeration via unrestricted properties](https://junglewise.ai/threats/cve-2026-25827-keyfactor-signserver-local-file-enumeration-via-unrestricted)
- [Keyfactor SignServer file content exposure in PKCS11CryptoToken](https://junglewise.ai/threats/cve-2026-25826-keyfactor-signserver-file-content-exposure-in-pkcs11cryptotoken)
- [Keyfactor SignServer arbitrary file write in SignerStatusReportWorker](https://junglewise.ai/threats/cve-2026-25825-keyfactor-signserver-arbitrary-file-write-in)
- [A class name enumeration was found in Keyfactor SignServer versions prior to 7.3.2. Setting any chosen class name to…](https://junglewise.ai/threats/cve-2025-47222-a-class-name-enumeration-was-found-in-keyfactor-signserver)
- [An arbitrary file write was found in Keyfactor SignServer versions prior to 7.3.2. The properties…](https://junglewise.ai/threats/cve-2025-47221-an-arbitrary-file-write-was-found-in-keyfactor-signserver)