How severe is CVE-2026-4147?

CVE-2026-4147 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-2026-4147 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4147?

CVE-2026-4147 primarily affects Mongodb. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-4147?

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

Does CVE-2026-4147 have an EU (EUVD) identifier?

Yes. CVE-2026-4147 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12586.

When was CVE-2026-4147 published?

CVE-2026-4147 was published on 2026-03-17 and last updated on 2026-06-17.

CVE-2026-4147

CVE-2026-4147 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-908.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-12586
Weakness: CWE-908
Affected product: Mongodb
Published: 2026-03-17
Last modified: 2026-06-17

Description

An authenticated user with the read role may read limited amounts of uninitialized stack memory via specially-crafted issuances of the filemd5 command.

Frequently asked questions

What is CVE-2026-4147?: An authenticated user with the read role may read limited amounts of uninitialized stack memory via specially-crafted issuances of the filemd5 command.
How severe is CVE-2026-4147?: CVE-2026-4147 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-2026-4147 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4147?: CVE-2026-4147 primarily affects Mongodb. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-4147?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4147 have an EU (EUVD) identifier?: Yes. CVE-2026-4147 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-12586.
When was CVE-2026-4147 published?: CVE-2026-4147 was published on 2026-03-17 and last updated on 2026-06-17.

References

https://jira.mongodb.org/browse/SERVER-119317

Affected products (6)

cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:*
cpe:2.3:a:mongodb:mongodb:8.3.0:alpha0:*:*:-:*:*:*
cpe:2.3:a:mongodb:mongodb:8.3.0:alpha1:*:*:-:*:*:*
cpe:2.3:a:mongodb:mongodb:8.3.0:alpha2:*:*:-:*:*:*
cpe:2.3:a:mongodb:mongodb:8.3.0:alpha3:*:*:-:*:*:*
cpe:2.3:a:mongodb:mongodb:8.3.0:rc1:*:*:-:*:*:*

More vulnerabilities in Mongodb

CVE-2017-15535 — Critical (CVSS 9.1): MongoDB 3.4.x before 3.4.10, and 3.5.x-development, has a disabled-by-default configuration setting,…
CVE-2026-11933 — High (CVSS 8.8): A use-after-free vulnerability exists in MongoDB Server's server-side JavaScript engine when converting BSON documents…
CVE-2026-8053 — High (CVSS 8.8): An issue in MongoDB Server's time-series collection implementation allows an authenticated user with database write…
CVE-2026-4148 — High (CVSS 8.8): A use-after-free vulnerability can be triggered in sharded clusters by an authenticated user with the read role who…
CVE-2024-1351 — High (CVSS 8.8): Under certain configurations of --tlsCAFile and tls.CAFile, MongoDB Server may skip peer certificate validation which…
CVE-2025-0755 — High (CVSS 8.4): The various bson_append functions in the MongoDB C driver library may be susceptible to buffer overflow when…

All CVEs affecting Mongodb →

Other CWE-908 (Use of Uninitialized Resource) vulnerabilities

CVE-2025-1942 — Critical (CVSS 9.8): When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated…
CVE-2024-47540 — Critical (CVSS 9.8): GStreamer is a library for constructing graphs of media-handling components. An uninitialized stack variable…
CVE-2024-32611 — Critical (CVSS 9.8): HDF5 Library through 1.14.3 may use an uninitialized value in H5A__attr_release_table in H5Aint.c.
CVE-2023-24941 — Critical (CVSS 9.8): Windows Network File System Remote Code Execution Vulnerability
CVE-2022-26437 — Critical (CVSS 9.8): In httpclient, there is a possible out of bounds write due to uninitialized data. This could lead to remote escalation…
CVE-2021-45703 — Critical (CVSS 9.8): An issue was discovered in the tectonic_xdv crate before 0.1.12 for Rust. XdvParser::<T>::process may read from…

Browse all CWE-908 (Use of Uninitialized Resource) vulnerabilities →

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)