How severe is CVE-2026-13066?

CVE-2026-13066 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-13066 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-13066?

CVE-2026-13066 affects Mongodb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-13066?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-13066 published?

CVE-2026-13066 was published on 2026-07-22 and last updated on 2026-08-05.

CVE-2026-13066

CVE-2026-13066 is a medium-severity vulnerability in Mongodb with a CVSS 3.x base score of 6.5. 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-843.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (14th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-843
Affected product: Mongodb
Published: 2026-07-22
Last modified: 2026-08-05

Description

Improper handling of DBPointer objects during BSON serialization in MongoDB's server-side JavaScript engine can result in internal process memory contents being included in data returned to the client. This constitutes an unintended information disclosure affecting deployments that use server-side JavaScript.

Frequently asked questions

What is CVE-2026-13066?: Improper handling of DBPointer objects during BSON serialization in MongoDB's server-side JavaScript engine can result in internal process memory contents being included in data returned to the client. This constitutes an unintended information disclosure affecting deployments that use server-side JavaScript.
How severe is CVE-2026-13066?: CVE-2026-13066 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-13066 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (14th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-13066?: CVE-2026-13066 affects Mongodb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-13066?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-13066 published?: CVE-2026-13066 was published on 2026-07-22 and last updated on 2026-08-05.

References

https://jira.mongodb.org/browse/SERVER-127694

Affected products (1)

cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*

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Other CWE-843 vulnerabilities

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CVE-2023-22579 — Critical (CVSS 9.9): Due to improper parameter filtering in the sequalize js library, can a attacker peform injection.
CVE-2026-16919 — Critical (CVSS 9.8): IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to improper…
CVE-2026-71558 — Critical (CVSS 9.8): Heap type confusion vulnerability in Apache Fory C++ deserialization. This issue affects Apache Fory C++ versions from…
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Threat intelligence

Threat-intel indicators referencing this CVE:

67.215.227.54 (ipv4-addr)
66.116.243.149 (ipv4-addr)
43.155.238.153 (ipv4-addr)
146.59.232.118 (ipv4-addr)
185.208.206.215 (ipv4-addr)