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Fencer Vulns
high 8.7

CVE-2026-27823 json

Remote Code Execution Vulnerability in EGroupware

published 2026-07-07 4 mo ago modified 2026-09-10 1 mo ago also EUVD-2026-45976 , GHSA-h9qx-v5xp-ph8p

cvss
8.7
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

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.

Patch / fix

  • packagist egroupware/egroupware 23.1.20260224, 26.2.20260224
  • egroupware egroupware 23.1.20260224, 26.2.20260224

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
3 mo ago

Exploit prediction

0.97% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA 4.0 8.7 CVSS: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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected packages

ecosystem package affected fixed in
packagist egroupware/egroupware
>=26.0.20251208, <26.2.20260224
<23.1.20260224
26.2.20260224
23.1.20260224

Affected products

  • EGroupware egroupware

Classification

Weakness
  • CWE-285 Improper Authorization
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
  • CWE-639 Authorization Bypass Through User-Controlled Key
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.