CVE-2026-78196

Arbitrary private-data overwrite via unsanitized shared filename

Published Aug 24, 2026 · Updated Aug 24, 2026

Path traversal in expo-share-intent 2.0.0 through 8.0.0 allows local users to overwrite Android app-private files through a shared stream. getDataColumn uses the sending ContentProvider's untrusted _display_name directly as a cacheDir-relative destination, so ../ segments escape the cache during the file copy. A malicious sending app needs no special Android permission, and the resulting write can replace data within the receiving app's private directory.

CVSS severity4.8
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in expo-share-intent 2.0.0 through 8.0.0 allows local users to overwrite Android app-private files through a shared stream. getDataColumn uses the sending ContentProvider's untrusted _display_name directly as a cacheDir-relative destination, so ../ segments escape the cache during the file copy. A malicious sending app needs no special Android permission, and the resulting write can replace data within the receiving app's private directory.

The record

CVE
CVE-2026-78196
Published
Aug 24, 2026
Updated
Aug 24, 2026
Vendor
Anselme Chorein
Product
expo-share-intent
Classifications
CWE-22, T1641
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=8.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Anselme Chorein · expo-share-intentversion=8.0

Published CVSS scores

3.2VulDBAV:L/AC:L/Au:S/C:N/I:P/A:P
4.4VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
4.4VulDBCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
4.8VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/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.

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)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1641Data Manipulation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo