Arbitrary file write via uncanonicalized remote filename
Published Jun 11, 2026 · Updated Jun 11, 2026
Path traversal in affected Spring Integration releases allows remote attackers to write arbitrary files via FTP, SFTP, or SMB filenames. The remote-file synchronizer joins a server-supplied filename to localDirectory without canonicalizing or rejecting traversal segments, so ../ escapes the configured download directory. Exploitation requires an application to poll a malicious or compromised file server; attacker-controlled content can then overwrite any file writable by the client process.
Summary
What happened
Path traversal in affected Spring Integration releases allows remote attackers to write arbitrary files via FTP, SFTP, or SMB filenames. The remote-file synchronizer joins a server-supplied filename to localDirectory without canonicalizing or rejecting traversal segments, so ../ escapes the configured download directory. Exploitation requires an application to poll a malicious or compromised file server; attacker-controlled content can then overwrite any file writable by the client process.
The record
- CVE
- CVE-2026-40987
- Published
- Jun 11, 2026
- Updated
- Jun 11, 2026
- Vendor
- Spring
- Product
- Spring Integration
- Classifications
- CWE-22, T1105
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Jun 11, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=5.5.0 <5.5.21
- Affected versionversion=6.3.0 <6.3.15
- Affected versionversion=6.4.0 <6.4.12
- Affected versionversion=6.5.0 <6.5.9
- Affected versionversion=7.0.0 <7.0.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- CVE-2026-40987 Spring Integration path-traversal PoCproof of concept · demonstrated
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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