CVE-2025-0755: The various bson_append functions in the MongoDB C driver library may be susceptible to buffer overflow when p

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HIGH 8.4UPGRADEUPGRADE

CVE-2025-0755 is a high-severity flaw (CVSS 8.4) affecting libbson, mongodb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The various bson_append functions in the MongoDB C driver library may be susceptible to buffer overflow when performing operations that could result in a final BSON document which exceeds the maximum allowable size (INT32_MAX), resulting in a segmentation fault and possible application crash. This issue affected libbson versions prior to 1.27.5, MongoDB Server v8.0 versions prior to 8.0.1 and MongoDB Server v7.0 versions prior to 7.0.16

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-122
Published	2025-03-18
Last modified	2026-06-17

Publisher (CNA): MongoDB, Inc. · Vendor: mongodb

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-03-18 09:15 UTCPublished CVE record published
2026-06-17 08:27 UTCUpdated Record last modified

mongodb libbson UPGRADE

Affected: < 1.27.5

Fixed in: 1.27.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy libbson || rpm -q libbson || libbson --version

2. UPGRADE to 1.27.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade libbson

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade libbson

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

mongodb mongodb UPGRADE

Affected: >= 7.0.0 and < 7.0.16 · 8.0.0

Fixed in: 7.0.16

Safe to downgrade to: a release before 7.0.0

1. Check installed version

apt-cache policy mongodb || rpm -q mongodb || mongodb --version

2. UPGRADE to 7.0.16 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade mongodb

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade mongodb

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 7.0.0 (Debian / Ubuntu)

apt-cache madison mongodb sudo apt install mongodb=<VERSION_BEFORE_7.0.0> sudo apt-mark hold mongodb

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mongodb sudo dnf downgrade mongodb-<VERSION_BEFORE_7.0.0> sudo dnf versionlock add mongodb

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-0755?

libbson: upgrade to 1.27.5; mongodb: upgrade to 7.0.16. Exact commands for each OS are on this page.

Is CVE-2025-0755 being exploited?

CVE-2025-0755 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-0755 affect?

CVE-2025-0755 affects libbson, mongodb. Severity is high (CVSS 8.4). The various bson_append functions in the MongoDB C driver library may be susceptible to buffer overflow when performing operations that could result in a final BSON document which exceeds the maximum allowable size (INT32_MAX), resulting in

How urgent is CVE-2025-0755?

Priority 43/100. High severity

Software pages

MongoDB vulnerabilities

Related CVEs

CVE-2024-6381 MEDIUM 4.0 UPGRADE The bson_strfreev function in the MongoDB C driver library may be susceptible to an integer overflow where the

References

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