CVE-2026-66755

Arbitrary file read via traversing assay filename

Published Jul 30, 2026 · Updated Jul 30, 2026

Path traversal in Apache Tika 1.8 through 3.3.1 and 4.0.0-alpha-1 allows local users to read files through ISA-Tab parsing. ISArchiveParser's parseAssay joins each untrusted Study Assay File Name value to the dataset directory without canonicalizing and enforcing containment. Attackers must place an ISA-Tab dataset where an application later parses it; readable files outside that directory are emitted into extracted text.

CVSS severity5.9
Medium
EPSS probability0.44%
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 Apache Tika 1.8 through 3.3.1 and 4.0.0-alpha-1 allows local users to read files through ISA-Tab parsing. ISArchiveParser's parseAssay joins each untrusted Study Assay File Name value to the dataset directory without canonicalizing and enforcing containment. Attackers must place an ISA-Tab dataset where an application later parses it; readable files outside that directory are emitted into extracted text.

The record

CVE
CVE-2026-66755
Published
Jul 30, 2026
Updated
Jul 30, 2026
Vendor
The Apache Software Foundation
Product
Apache Tika
Classifications
CWE-22, T1005
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 30, 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=1.8 <3.3.2
  2. Affected versionversion=4.0.0-alpha-1 <4.0.0-beta-1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Apache Software Foundation · Apache Tikaversion=1.8 <3.3.2; version=4.0.0-alpha-1 <4.0.0-beta-1

Published CVSS scores

7.5NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.9Apache Software FoundationCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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 exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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