CVE-2026-88023 MongoDB CVE debrief

Who should care

Defenders responsible for MongoDB PHP Library deployments, particularly those using GridFS, should assess exposure and prioritize remediation. This includes verifying the library version, restricting user input, and monitoring GridFS file content and bucket access. Security teams and vulnerability management teams should also review the affected application and GridFS usage to identify potential exposure and develop compensating controls for exposed Mongo

Why it matters

CVE-2026-88023 is a medium-severity vulnerability in the MongoDB PHP Library's GridFS component, allowing an authenticated user to manipulate file identifiers and potentially access or remove stored file content. Defenders should prioritize verifying and remediating this vulnerability in their deployments.

• Potential unauthorized access to stored file content beyond intended targets.
• Possible removal of GridFS file chunks, rendering stored file content unreadable.
• Need for verification of user input to prevent influencing the identifier passed to the affected application.
• Potential for renaming stored files other than the intended target.

Technical summary

The vulnerability in the MongoDB PHP Library's GridFS component allows an authenticated user to influence the identifier passed to the affected application, potentially leading to stored file content disclosure or removal. This is due to improper neutralization of special elements in data query logic. The affected application may obtain stored file content beyond the intended target or cause all GridFS file chunks in the affected bucket to be removed, rendering stored file content unreadable. The vulnerability has a medium severity with a CVSS score of 6.1.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability in their MongoDB PHP Library deployments.

Recommended defensive actions

• Verify the MongoDB PHP Library version and check if it's within the vulnerable range (1.1.0 to 1.21.5 or 2.0.0 to 2.4.2).
• Apply the necessary patches or updates to bring the library version outside the vulnerable range.
• Review and restrict user input to prevent influencing the identifier passed to the affected application.
• Monitor GridFS file content and bucket access to detect potential unauthorized actions.
• Perform a thorough review of the affected application and GridFS usage to identify potential exposure.
• Develop and implement compensating controls for exposed systems while remediation is scheduled and verified.
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in the MongoDB PHP Library, including its impact on GridFS file content accessibility and potential for file removal. Evidence is limited to public CVE and NVD information. Defenders should verify the MongoDB PHP Library version and check if it's within the vulnerable range (1.1.0 to 1.21.5 or 2.0.0 to 2.4.2).

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.