VulnerabilityDeferred

CVE-2026-27823

A vulnerability has been identified in EGroupware that may lead to Remote Code Execution (RCE).

HIGH 8.7EPSS 1.03%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (1.03%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A vulnerability has been identified in EGroupware that may lead to Remote Code Execution (RCE). The issue allows an authenticated attacker to execute arbitrary commands on the server. If user self-registration is enabled, the vulnerability may be exploitable without prior authentication. The vulnerability stems from improper authorization checks combined with a file write primitive and an arbitrary file read vulnerability, which together enable full system compromise. This has been patched in versions 26.2.20260224 and 23.1.20260224.

CVSS 4.0: 8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 1.03% probability · 62th percentile
CISA KEV: Not listed
Weakness: CWE-285
Source: security-advisories@github.com

References

https://github.com/EGroupware/egroupware/security/advisories/GHSA-h9qx-v5xp-ph8p

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.