How severe is CVE-2025-12119?

No CVSS score has been assigned to CVE-2025-12119 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2025-12119?

CVE-2025-12119 affects the following packages: mongodb/mongodb-extension (Packagist). Ecosystems affected: Packagist.

How do I fix CVE-2025-12119?

Update mongodb/mongodb-extension to 1.21.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-12119 is resolved across your whole dependency graph.

How do I detect CVE-2025-12119 in my Packagist dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mongodb/mongodb-extension, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate CVE-2025-12119 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Is CVE-2025-12119 actively exploited in the wild?

No public exploit code has been indexed for CVE-2025-12119 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2025-12119?

CVE-2025-12119 has an EPSS (Exploit Prediction Scoring System) score of 0.2%, placing it in the 12th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2025-12119?

CVE-2025-12119 is classified as CWE-825 (CWE-825). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2025-12119 published, and has it been updated?

CVE-2025-12119 was published on November 18, 2025 and was last updated on October 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🐘 Packagist

Not in CISA KEV

CVE-2025-12119 — mongodb-extension

Fix: mongodb/mongo-c-driver@775998d

CVE-2025-12119 is a CWE-825 vulnerability in mongodb/mongodb-extension. A fix is available for mongodb/mongodb-extension — see the affected versions and patch details below.

Bulk write with options may read invalid memory

Also known asGHSA-mwcc-7vpp-xmv9

Published

Nov 18, 2025

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2025-12119.

EPSS Exploitation Probability

via FIRST.org ↗

0.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs12th percentile — riskier than 12% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

🐘mongodb/mongodb-extension

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

A mongoc_bulk_operation_t may read invalid memory if large options are passed.

Affected Packages

1 total 1 fixed

Ecosystem	Package	Vulnerable range	Fix
🐘Packagist	`mongodb/mongodb-extension`	all versions	1.21.2`composer require mongodb/mongodb-extension:^1.21.2`

Affected Products

2 products · 3 configurations

Application

c drivermongodb

≥ 2.0.0 && < 2.1.2

range

Application

php drivermongodb

< 1.21.2

range

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mongodb/mongodb-extension, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update mongodb/mongodb-extension to 1.21.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-12119 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

A mongoc_bulk_operation_t may read invalid memory if large options are passed.

O3 Security · Impact-Aware SCA

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