CVE-2026-53486Network attack vector

Arbitrary file read and write via archive escape

Published Jul 14, 2026 · Updated Jul 14, 2026

Path traversal in XhmikosR @xhmikosr/decompress before 10.2.1 and 11.0.0 through 11.1.2 allows remote attackers to read or write files. Archive-entry writing creates hardlinks and symlinks without validating their targets, treats sibling paths as contained through a string-prefix test, and preserves special mode bits. Exploitation requires a consuming application to extract an attacker-influenced archive; file access is limited to the process account, while root execution can create privileged files.

CVSS severity9.1
Critical
EPSS probability0.75%
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 XhmikosR @xhmikosr/decompress before 10.2.1 and 11.0.0 through 11.1.2 allows remote attackers to read or write files. Archive-entry writing creates hardlinks and symlinks without validating their targets, treats sibling paths as contained through a string-prefix test, and preserves special mode bits. Exploitation requires a consuming application to extract an attacker-influenced archive; file access is limited to the process account, while root execution can create privileged files.

The record

CVE
CVE-2026-53486
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
XhmikosR
Product
@xhmikosr/decompress
Classifications
CWE-22, CWE-59, CWE-732
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 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=< 10.2.1
  2. Affected versionversion=>= 11.0.0, < 11.1.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

XhmikosR · @xhmikosr/decompressversion=< 10.2.1; version=>= 11.0.0, < 11.1.3

Published CVSS scores

9.1GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-59Improper Link Resolution Before File Access ('Link Following')
CWE-732Incorrect Permission Assignment for Critical Resource

Public exploit references

No public exploit references are available in this record.

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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