CVE-2025-26787

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 54/100
Published: 2025-12-22 Modified: 2026-11-04 First seen: 2026-11-04 Status: active

Attack Surface

Network Low Complexity No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: High
UI: None
S: Unchanged
C: Low
I: Low
A: Low

Description

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".

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
keyfactor signserver < 7.2

Bug Bounty Relevance

54 / 100
✓ Network accessible
✓ Low complexity
✓ No user interaction

CVSS Score

4.7 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

EPSS — Exploitation Probability

0.15%
Raw Score 0.001480
Percentile 4.1%
Date 2026-11-14

EPSS Trend

2026-11-14
0.00148
2026-11-13
0.00148
2026-11-12
0.00148
2026-11-10
0.00148
2026-11-09
0.00148
2026-11-08
0.00148
2026-11-07
0.00148
2026-11-06
0.00148
2026-11-05
0.00148
2026-11-04
0.00148

Intelligence Sources

nvd ref →