CVE-2026-40383: Joomla! Core - [20260509] - LFI in HTMLView layout parameter
Analyzed
Published 26-05-2026Last modified 27-05-2026
Vulnerability summary
CVE-2026-40383 is a critical (CVSS 9.8) Path Traversal vulnerability in joomla! project joomla! cms. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 45.7% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
0.56%
0%100%
Low · +0.06 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Timeline
- 26-05-2026PublishedVulnerability first disclosed.
- 27-05-2026Last modifiedVulnerability information updated.
Description
An improper validation of user-supplied input leads to a local file inclusion vulnerability.
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.5Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NSourcesAll 2 agree
- NVDNIST7.5HighCVSS:4.0/AV:N/AC:L/AT:P/PR:H/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
Critical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
EPSS trend
Probability
0.56%
Chance of exploitation in the next 30 days
Percentile
46%
Versus all other CVEs
30-day change
Increase +0.06 pp
From 0.50% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Joomla1 product
- joomla\!≥ 3.2.1, < 5.4.6 | ≥ 6.0.0, < 6.1.1
Joomla! project1 product
- joomla! cms3.2.1-5.4.5 | 6.0.0-6.1.0
2 vendors · 2 products