CVE-2024-38986: Prototype Pollution in 75lb deep-merge 1.1.1 allows attackers to execute arbitrary code or cause a Denial of S

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CRITICAL 9.8REMOTEDOWNGRADE

CVE-2024-38986 is a critical-severity flaw (CVSS 9.8) affecting deep-merge. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Prototype Pollution in 75lb deep-merge 1.1.1 allows attackers to execute arbitrary code or cause a Denial of Service (DoS) and cause other impacts via merge methods of lodash to merge objects.

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-1321
Published	2024-07-30
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 75lb

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

Am I affected?

Timeline

2024-07-30 20:15 UTCPublished CVE record published
2026-06-17 07:41 UTCUpdated Record last modified

75lb deep-merge DOWNGRADE

Affected: 1.1.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.1.1

1. Check installed version

apt-cache policy deep-merge || rpm -q deep-merge || deep-merge --version

2. No fixed release: DOWNGRADE to a release before 1.1.1 (Debian / Ubuntu)

apt-cache madison deep-merge sudo apt install deep-merge=<VERSION_BEFORE_1.1.1> sudo apt-mark hold deep-merge

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list deep-merge sudo dnf downgrade deep-merge-<VERSION_BEFORE_1.1.1> sudo dnf versionlock add deep-merge

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-2024-38986?

deep-merge: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-38986 being exploited?

CVE-2024-38986 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-2024-38986 affect?

CVE-2024-38986 affects deep-merge. Severity is critical (CVSS 9.8). Prototype Pollution in 75lb deep-merge 1.1.1 allows attackers to execute arbitrary code or cause a Denial of Service (DoS) and cause other impacts via merge methods of lodash to merge objects.

How urgent is CVE-2024-38986?

Priority 60/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Lodash vulnerabilities

References

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