CVE-2026-49982Public exploitNetwork attack vector

Arbitrary file creation via non-string path options

Published Jun 11, 2026 · Updated Jun 11, 2026

Path traversal in tmp 0.2.6 allows remote attackers to create files or directories outside the temporary directory through untrusted options. The _assertPath guard tests non-string prefix, postfix, or template values with includes('..'), but _generateTmpName later coerces them into traversal-bearing strings. Reachability requires an application to pass attacker-controlled values into a tmp creation API; resulting writes use the host process's filesystem privileges.

CVSS severity8.2
High
EPSS probability0.50%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in tmp 0.2.6 allows remote attackers to create files or directories outside the temporary directory through untrusted options. The _assertPath guard tests non-string prefix, postfix, or template values with includes('..'), but _generateTmpName later coerces them into traversal-bearing strings. Reachability requires an application to pass attacker-controlled values into a tmp creation API; resulting writes use the host process's filesystem privileges.

The record

CVE
CVE-2026-49982
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
KARASZI István
Product
tmp
Classifications
CWE-20, CWE-22
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

KARASZI István · tmpversion=0.2.6

Published CVSS scores

8.2GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Public exploit references

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Technologies

Your stack

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Your stack

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