CVE-2026-54557Public exploit

Local symlink placement via unsanitized version path

Published Jun 26, 2026 · Updated Jun 26, 2026

Path traversal in the HTTP backend in jdx mise before 2026.6.1 allows local users to create symlinks outside the install tree. The create_install_symlink function joins a raw repository-controlled version to the installs root, and an absolute Unix path discards that root. Exploitation requires a user to run mise install for the crafted project; bin_path can replace a command under a selected PATH prefix, but mise does not automatically execute it.

CVSS severity5.5
Medium
EPSS probability0.17%
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 the HTTP backend in jdx mise before 2026.6.1 allows local users to create symlinks outside the install tree. The create_install_symlink function joins a raw repository-controlled version to the installs root, and an absolute Unix path discards that root. Exploitation requires a user to run mise install for the crafted project; bin_path can replace a command under a selected PATH prefix, but mise does not automatically execute it.

The record

CVE
CVE-2026-54557
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
jdx
Product
mise
Classifications
CWE-22, T1574.007, T1204.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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=< 2026.6.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

jdx · miseversion=< 2026.6.1

Published CVSS scores

5.5GitHub, Inc.CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1574.007PATH Environment Variable Hijacking
T1204.002User Execution Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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