CVE-2026-4045Public exploitNetwork attack vector

Unauthenticated LDAP account inference via unescaped filter

Published Mar 12, 2026 · Updated Mar 12, 2026

LDAP response discrepancy in ProjectSend r1945 allows remote attackers to infer LDAP account data through crafted login requests. The loginLdap method inserts ldap_email directly into the (mail=...) filter passed to ldap_search without LDAP-filter escaping, producing match-dependent outcomes. Exploitation requires LDAP authentication to be configured and reachable through the login flow; the reported consequence is limited to disclosure through response differences.

CVSS severity3.7
Low
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

LDAP response discrepancy in ProjectSend r1945 allows remote attackers to infer LDAP account data through crafted login requests. The loginLdap method inserts ldap_email directly into the (mail=...) filter passed to ldap_search without LDAP-filter escaping, producing match-dependent outcomes. Exploitation requires LDAP authentication to be configured and reachable through the login flow; the reported consequence is limited to disclosure through response differences.

The record

CVE
CVE-2026-4045
Published
Mar 12, 2026
Updated
Mar 12, 2026
Vendor
ProjectSend
Product
ProjectSend
Classifications
CWE-204, CWE-203, T1087.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 12, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 12, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=r1945

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ProjectSend · ProjectSendversion=r1945

Published CVSS scores

2.6VulDBAV:N/AC:H/Au:N/C:P/I:N/A:N
2.9VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P
3.7VulDBCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-204Observable Response Discrepancy
CWE-203Information Exposure Through Discrepancy
T1087.002Domain Account

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo