HOMEVULNERABILITIESCVE-2026-4591
MEDIUM

CVE-2026-4591

CWE-77Published: March 23, 2026· Updated: Mar 24, 2026

4.7
CVSS v3.1
EPSS:0.23%probability of exploitation in 30 daysPercentile:45.6th

Official Description

A weakness has been identified in kalcaddle kodbox 1.64. This affects the function checkBin of the file /workspace/source-code/plugins/fileThumb/app.php of the component fileThumb Endpoint. Executing a manipulation can lead to os command injection. The attack can be executed remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

NVD Source

Technical Analysis

CVE-2026-4591 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires high privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.High
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L

Affected Vendors & Products

Mentioned vendors (from description):
PHP
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 (4)

→
https://vuldb.com/?ctiid.352427
→
https://vuldb.com/?id.352427
→
https://vuldb.com/?submit.775470
→
https://vulnplus-note.wetolink.com/share/3ml5XA0firIa

Quick Facts

CVE IDCVE-2026-4591
CVSS Score4.7 / 10
SeverityMEDIUM
WeaknessCWE-77
CISA KEVNo
EPSS (30d)0.23%
PublishedMar 23, 2026

Related CVEs (CWE-77)

CVE-2025-15379
10.0
CVE-2026-26068
9.9
CVE-2026-20186
9.9
CVE-2026-20147
9.9
CVE-2026-45663
9.9
CVE-2026-52806
KEV9.9

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-4591 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.COM. CVE data is provided under the NVD usage policy.
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