HOMEVULNERABILITIESCVE-2026-61900
CRITICAL

CVE-2026-61900

CWE-434Published: July 20, 2026· Updated: Jul 20, 2026

10.0
CVSS v3.1

Official Description

The Joomla extension JDownloads is vulnerable to an unauthenticated file upload, leading to full RCE.

NVD Source

Risk Analysis

The JDownloads extension for Joomla is vulnerable to an unauthenticated file upload, which allows an attacker to gain full remote code execution. This is a critical flaw that grants an attacker complete control over the Joomla instance. The CVSS score of 10.0 reflects the maximum severity of this vulnerability.

No public exploit is known, and it is not in the KEV catalog. The vulnerability is remotely exploitable with no authentication required.

Recommended Action

Update the JDownloads extension to the latest available version and implement strict file type validation.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2026-61900 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeX
Impact
Confidentiality
Integrity
Availability
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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 Vendors & Products

Mentioned vendors (from description):
Joomla
CPE data not yet available in NVD for this CVE.

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (2)

→
https://mysites.guru/blog/jdownloads-4-1-unauthenticated-upload-flaw/
→
https://www.jdownloads.com/

Quick Facts

CVE IDCVE-2026-61900
CVSS Score10.0 / 10
SeverityCRITICAL
WeaknessCWE-434
CISA KEVNo
PublishedJul 20, 2026

Related CVEs (CWE-434)

CVE-2019-7268
10.0
CVE-2021-42645
10.0
CVE-2025-6327
10.0
CVE-2019-10959
10.0
CVE-2026-57700
KEV10.0
CVE-2023-49815
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-61900 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2026-61900·NVD