How severe is CVE-2026-93765?

CVE-2026-93765 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-93765 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-93765?

CVE-2026-93765 primarily affects Mongodb Mongoid. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-93765?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-93765 published?

CVE-2026-93765 was published on 2026-09-18 and last updated on 2026-09-25.

CVE-2026-93765

CVE-2026-93765 is a critical-severity vulnerability in Mongodb Mongoid with a CVSS 3.x base score of 9.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-470.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v4: 8.3
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-470
Affected product: Mongodb Mongoid
Published: 2026-09-18
Last modified: 2026-09-25

Description

Mongoid contains an unsafe reflection weakness in the document persistence layer of its object-document mapping code. Input whose keys are passed through from an unauthenticated party by an embedding application can cause unintended internal method invocation instead of the intended array field update. This may result in unintended removal of stored records and in the embedding application becoming unresponsive.

Frequently asked questions

What is CVE-2026-93765?: Mongoid contains an unsafe reflection weakness in the document persistence layer of its object-document mapping code. Input whose keys are passed through from an unauthenticated party by an embedding application can cause unintended internal method invocation instead of the intended array field update. This may result in unintended removal of stored records and in the embedding application becoming unresponsive.
How severe is CVE-2026-93765?: CVE-2026-93765 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-93765 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-93765?: CVE-2026-93765 primarily affects Mongodb Mongoid. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-93765?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-93765 published?: CVE-2026-93765 was published on 2026-09-18 and last updated on 2026-09-25.

References

https://jira.mongodb.org/browse/MONGOID-5973

Affected products (2)

cpe:2.3:a:mongodb:mongoid:*:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongoid:9.1.0:*:*:*:*:*:*:*

More vulnerabilities in Mongodb Mongoid

CVE-2026-93762 — Critical (CVSS 9.8): Mongoid contains an unsafe reflection weakness in the query path used for embedded documents. An application that…
CVE-2026-93759 — High (CVSS 8.6): Mongoid does not neutralize a string-typed query criterion supplied to its query builder, and instead passes it to the…
CVE-2026-93760 — High (CVSS 8.2): Mongoid does not restrict which query operators may come from caller-supplied filter data when an application hands…
CVE-2026-93758 — High (CVSS 8.1): An insecure direct object reference in the nested attributes handling of the Mongoid object-document mapper may allow a…
CVE-2026-93761 — High (CVSS 7.5): An inefficient regular expression complexity issue in the in-memory query evaluation component of the Mongoid library…
CVE-2026-93764 — Medium (CVSS 6.5): Mongoid may omit encryption rules for fields declared on embedded models when generating the client-side field-level…

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Other CWE-470 (Unsafe Reflection) vulnerabilities

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