CVE-2022-25858: The package terser before 4.8.1, from 5.0.0 and before 5.14.2 are vulnerable to Regular Expression Denial of S

Q: How do I fix CVE-2022-25858?

terser: upgrade to 4.8.1, 5.14.2. Exact commands for each OS are on this page.

Q: Is CVE-2022-25858 being exploited?

CVE-2022-25858 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-25858 affect?

CVE-2022-25858 affects terser. Severity is medium (CVSS 5.3). The package terser before 4.8.1, from 5.0.0 and before 5.14.2 are vulnerable to Regular Expression Denial of Service (ReDoS) due to insecure usage of regular expressions.

Q: How urgent is CVE-2022-25858?

Priority 51/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2022-25858 is a medium-severity flaw (CVSS 5.3) affecting terser. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The package terser before 4.8.1, from 5.0.0 and before 5.14.2 are vulnerable to Regular Expression Denial of Service (ReDoS) due to insecure usage of regular expressions.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	3.3% (top 12%)
CISA exploited list	No
Weakness	CWE-1333
Published	2022-07-15
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: terser

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

Am I affected?

Timeline

2022-07-15 20:15 UTCPublished CVE record published
2026-06-17 04:34 UTCUpdated Record last modified

terser terser UPGRADE

Affected: < 4.8.1 · >= 5.0.0 and < 5.14.2

Fixed in: 4.8.1, 5.14.2

Safe to downgrade to: a release before 5.0.0

1. Check installed version

npm ls terser

2. UPGRADE to 4.8.1

npm install terser@">=4.8.1"

3. If no update is available yet, DOWNGRADE to a release before 5.0.0

npm view terser versions npm install terser@"<5.0.0"

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-2022-25858?

terser: upgrade to 4.8.1, 5.14.2. Exact commands for each OS are on this page.

Is CVE-2022-25858 being exploited?

CVE-2022-25858 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-2022-25858 affect?

CVE-2022-25858 affects terser. Severity is medium (CVSS 5.3). The package terser before 4.8.1, from 5.0.0 and before 5.14.2 are vulnerable to Regular Expression Denial of Service (ReDoS) due to insecure usage of regular expressions.

How urgent is CVE-2022-25858?

Priority 51/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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