How severe is CVE-2026-1849?

CVE-2026-1849 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 none, integrity none, and availability high.

Is CVE-2026-1849 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-1849?

CVE-2026-1849 affects Mongodb. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-1849?

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

Does CVE-2026-1849 have an EU (EUVD) identifier?

Yes. CVE-2026-1849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6757.

When was CVE-2026-1849 published?

CVE-2026-1849 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2026-1849

CVE-2026-1849 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-674.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (19th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6757
Weakness: CWE-674
Affected product: Mongodb
Published: 2026-02-10
Last modified: 2026-06-17

Description

MongoDB Server may experience an out-of-memory failure while evaluating expressions that produce deeply nested documents. The issue arises in recursive functions because the server does not periodically check the depth of the expression.

Frequently asked questions

What is CVE-2026-1849?: MongoDB Server may experience an out-of-memory failure while evaluating expressions that produce deeply nested documents. The issue arises in recursive functions because the server does not periodically check the depth of the expression.
How severe is CVE-2026-1849?: CVE-2026-1849 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 none, integrity none, and availability high.
Is CVE-2026-1849 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (19th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-1849?: CVE-2026-1849 affects Mongodb. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-1849?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-1849 have an EU (EUVD) identifier?: Yes. CVE-2026-1849 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6757.
When was CVE-2026-1849 published?: CVE-2026-1849 was published on 2026-02-10 and last updated on 2026-06-17.

References

https://jira.mongodb.org/browse/SERVER-102364

Affected products (1)

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

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CVE-2018-1000618 — Critical (CVSS 9.8): EOSIO/eos eos version after commit f1545dd0ae2b77580c2236fdb70ae7138d2c7168 contains a stack overflow vulnerability in…
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Threat intelligence

Threat-intel indicators referencing this CVE:

1.234.27.159 (ipv4-addr)
103.7.41.117 (ipv4-addr)
167.71.60.5 (ipv4-addr)