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Vulnerabilities

Vulnerability · CVE-2026-109957

IDOR allowing users with access to Import scope to extract data from attachments with known ID

Published Sep 29, 2026 · catalog updated Oct 22, 2026 · IDOR allowing users with

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-109957. EPSS is 0.20%. Act only if a listed version of IDOR allowing users with is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (IDOR allowing users with).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium4.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.20%
Remediation
Not established
Affected products
See sources for product scope

## Summary I identified an authenticated authorization bypass in EspoCRM’s import workflow. accepts a caller-controlled , but the backend does not verify that the current user is authorized to read that attachment before opening it from storage. An attacker can create their own Import record using another user’s attachment ID. After the Import record is created, the attacker can call the error export endpoint on their own Import record. EspoCRM then re-opens the original source attachment and copies source rows from that file into a new downloadable CSV attachment owned by the attacker. This allows a low-privileged authenticated user to disclose contents of another user’s attachment when the attachment ID is known. ## Credit @kaizhi888

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2026-109957

  • No stored fix

    No vendor fix text is stored. Use the linked advisory before you change production.

  • Version check

    No version range is stored, so an installed version cannot be checked on this page.

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-109957. EPSS is 0.20%. Act only if a listed version of IDOR allowing users with is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-639: Authorization Bypass Through User-Controlled Key; CWE-862: Missing Authorization. EPSS 0.20%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

EspoCRM security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 29, 2026 · Maintainer security tabs

    Detected

    ## Summary I identified an authenticated authorization bypass in EspoCRM’s import workflow. accepts a caller-controlled , but the backend does not verify that the current user is authorized to read that attachment before opening it from storage. An attacker can create their own Import record using another user’s attachment ID. After the Import record is created, the attacker can call the error exp

  2. Oct 22, 2026 · Maintainer security tabs

    Updated

    ## Summary I identified an authenticated authorization bypass in EspoCRM’s import workflow. accepts a caller-controlled , but the backend does not verify that the current user is authorized to read that attachment before opening it from storage. An attacker can create their own Import record using another user’s attachment ID. After the Import record is created, the attacker can call the error exp

Sources

  • CVE.orgVulnerability recordCVE-2026-109957

    Official CVE identifier

    cve.org
  • Maintainer security tabsVendor advisoryGHSA-5729-xq64-4h22

    ## Summary I identified an authenticated authorization bypass in EspoCRM’s import workflow. accepts a caller-controlled , but the backend does not verify that the current user is authorized to read that attachment before opening it from storage. An attacker can create their own Import record using another user’s attachment ID. After the Import record is created, the attacker can call the error exp

    github.com

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 2, 2026
  • Maintainer security tabsNov 1, 2026