CVE-2025-61140: The value function in jsonpath 1.1.1 lib/index.js is vulnerable to Prototype Pollution.

Q: How do I fix CVE-2025-61140?

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

Q: Is CVE-2025-61140 being exploited?

CVE-2025-61140 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-2025-61140 affect?

CVE-2025-61140 affects jsonpath. Severity is critical (CVSS 9.8). The value function in jsonpath 1.1.1 lib/index.js is vulnerable to Prototype Pollution.

Q: How urgent is CVE-2025-61140?

Priority 50/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2025-61140 is a critical-severity flaw (CVSS 9.8) affecting jsonpath. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The value function in jsonpath 1.1.1 lib/index.js is vulnerable to Prototype Pollution.

Why this priority

Critical severity
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	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-1321, CWE-502
Published	2026-01-28
Last modified	2026-09-07

Publisher (CNA): MITRE · Vendor: dchester

Last updated 2026-09-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-01-28 16:16 UTCPublished CVE record published
2026-09-07 13:17 UTCUpdated Record last modified

dchester jsonpath 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

npm ls jsonpath

2. No fixed release: DOWNGRADE to a release before 1.1.1

npm view jsonpath versions npm install jsonpath@"<1.1.1"

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-2025-61140?

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

Is CVE-2025-61140 being exploited?

CVE-2025-61140 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-2025-61140 affect?

CVE-2025-61140 affects jsonpath. Severity is critical (CVSS 9.8). The value function in jsonpath 1.1.1 lib/index.js is vulnerable to Prototype Pollution.

How urgent is CVE-2025-61140?

Priority 50/100. Critical severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs