CVE-2026-49982: tmp is a temporary file and directory creator for node.js

Q: How do I fix CVE-2026-49982?

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

Q: Is CVE-2026-49982 being exploited?

CVE-2026-49982 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-2026-49982 affect?

CVE-2026-49982 affects tmp. Severity is high (CVSS 8.2). tmp is a temporary file and directory creator for node.js. In version 0.2.6, the _assertPath guard added to tmp rejects only string values that contain the substring ... It is bypassed when prefix, postfix, or template is supplied as a non-

Q: How urgent is CVE-2026-49982?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.2REMOTEDOWNGRADE

CVE-2026-49982 is a high-severity flaw (CVSS 8.2) affecting tmp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

tmp is a temporary file and directory creator for node.js. In version 0.2.6, the _assertPath guard added to tmp rejects only string values that contain the substring ... It is bypassed when prefix, postfix, or template is supplied as a non-string value (Array, Buffer, or any object) whose includes('..') returns falsy but whose stringification still contains ../. The value flows through Array.prototype.join/String coercion inside _generateTmpName

Why this priority

High 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	8.2 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 58%)
CISA exploited list	No
Weakness	CWE-20, CWE-22
Published	2026-06-11
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: raszi

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-11 17:16 UTCPublished CVE record published
2026-10-26 11:10 UTCUpdated Record last modified

raszi tmp DOWNGRADE

Affected: 0.2.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.2.6

1. Check installed version

npm ls tmp

2. No fixed release: DOWNGRADE to a release before 0.2.6

npm view tmp versions npm install tmp@"<0.2.6"

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-2026-49982?

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

Is CVE-2026-49982 being exploited?

CVE-2026-49982 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-2026-49982 affect?

CVE-2026-49982 affects tmp. Severity is high (CVSS 8.2). tmp is a temporary file and directory creator for node.js. In version 0.2.6, the _assertPath guard added to tmp rejects only string values that contain the substring ... It is bypassed when prefix, postfix, or template is supplied as a non-

How urgent is CVE-2026-49982?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Node.js vulnerabilities · Postfix vulnerabilities

Related CVEs

CVE-2026-44705 HIGH 8.2 UPGRADE tmp is a temporary file and directory creator for node.js

References

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