PT-2026-29505 · Unknown · Autoupdate Server

Phil Taylor · Published 2026-04-01 · Updated 2026-06-07 · CVE-2026-23898

Positive Technologies (AI Summary)

CVSS v4.0

8.6

High

Base vector

AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Joomla! versions prior to v2.18.0

Description A lack of input validation in the autoupdate server mechanism allows for arbitrary file deletion. Attackers can bypass input validation by supplying crafted file paths, potentially leading to the deletion of arbitrary files on the web server filesystem with web server privileges. Approximately 125.5k+ instances are identified globally.

Recommendations Update to version 2.18.0 or later.

Fix

Weakness Enumeration

CWE-73

Related Identifiers

BIT-JOOMLA-2026-23898

CVE-2026-23898

Affected Products

Autoupdate Server

References · 14

• https://developer.joomla.org/security-centre/1031-20260305-core-arbitrary-file-deletion-in-com-joomlaupdate.html · Vendor Advisory
• https://osv.dev/vulnerability/BIT-joomla-2026-23898 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23898 · Security Note
• https://twitter.com/lyrie_ai/status/2063512313643053522 · Twitter Post
• https://twitter.com/zoomeye_team/status/2039895042861744329 · Twitter Post
• https://twitter.com/Anastasis_King/status/2057691177562894619 · Twitter Post
• https://twitter.com/Anastasis_King/status/2041901635018928582 · Twitter Post
• https://twitter.com/CVEnew/status/2039279621284511823 · Twitter Post
• https://twitter.com/lyrie_ai/status/2063512312728752254 · Twitter Post
• https://twitter.com/HunterMapping/status/2039987448608936186 · Twitter Post
• https://t.me/brutsecurity/2629 · Telegram Post
• https://twitter.com/UndercodeUpdate/status/2042315422897225869 · Twitter Post
• https://twitter.com/darkeye_team/status/2039897854874169616 · Twitter Post
• https://twitter.com/the_yellow_fall/status/2039722019336429853 · Twitter Post