Unauthorized S3 operations via expired signed requests
Published Jan 15, 2026 · Updated Jan 15, 2026
Authentication bypass in Treeverse lakeFS before 1.75.0 allows remote attackers to repeat captured signed S3 requests after expiration. The S3 gateway signature verifier accepts authentication data without checking its signing time or X-Amz-Expires value. Exploitation requires a previously valid signed request obtained through interception, logs, or a compromised system; replay repeats only the object operation and access embodied in that request until its credentials are rotated.
Summary
What happened
Authentication bypass in Treeverse lakeFS before 1.75.0 allows remote attackers to repeat captured signed S3 requests after expiration. The S3 gateway signature verifier accepts authentication data without checking its signing time or X-Amz-Expires value. Exploitation requires a previously valid signed request obtained through interception, logs, or a compromised system; replay repeats only the object operation and access embodied in that request until its credentials are rotated.
The record
- CVE
- CVE-2025-68671
- Published
- Jan 15, 2026
- Updated
- Jan 15, 2026
- Vendor
- Treeverse
- Product
- lakeFS
- Classifications
- CWE-294, T1550
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jan 15, 2026CVE publishedPublication date reported by the CVE source.
- Jan 15, 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.
- Affected versionversion=< 1.75.0
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
- Expired S3 presigned GET reproductionproof of concept · demonstrated
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