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TI-2026-26036 Aliases CVE-2026-33656

Path traversal in espocrm

Priority HIGH 74CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

EspoCRM is an open source customer relationship management application. Prior to version 9.3.4, EspoCRM's built-in formula scripting engine allowing updating attachment's sourceId thus allowing an authenticated admin to overwrite the `sourceId` field on `Attachment` entities. Because `sourceId` is concatenated directly into a file path with no sanitization in `EspoUploadDir::getFilePath()`, an attacker can redirect any file read or write operation to an arbitrary path within the web server's `open_basedir` scope. Version 9.3.4 fixes the issue.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.005 43rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed espocrm (espocrm): 9.3.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
espocrmespocrmbefore 9.3.49.3.4Patch availableCNA
  • espocrm Vendorespocrm Affected before 9.3.4 Fixed in 9.3.4 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:espocrm:espocrm:*:*:*:*:*:*:*:*before 9.3.4Vulnerableespocrm
  • cpe:2.3:a:espocrm:espocrm:*:*:*:*:*:*:*:* Versions before 9.3.4 Vulnerable ·espocrm

Remediation

  • Fix · CNA espocrm (espocrm) Fixed in 9.3.4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33656

References

Exploit 1

  • TI-2020-19229 EspoCRM 5.7.0 < 5.9.0 - Two-Factor Authentication Bypass via Auth Token Reuse Between Accounts with Identical Passwords CVSS 4.0HIGH 8.6
  • TI-2025-32670 EspoCRM vulnerable to LDAP Injection through Improper Neutralization of Special Elements CVSS 3.1MEDIUM 6.5
  • TI-2026-26112 EspoCRM has Admin TemplateManager path traversal that allows arbitrary file read write and delete CVSS 3.1HIGH 7.2
  • TI-2025-23468 EspoCRM vulnerable to HTML Injection into phishing, which may lead to account takeover CVSS 4.0HIGH 7.0
  • TI-2024-16335 EspoCRM weakness in "Forgot password" CVSS 3.1MEDIUM 5.9
  • TI-2026-26119 EspoCRM: Email importEml can import and delete another user's attachment by raw fileId CVSS 3.1MEDIUM 5.4
See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences