CVE-2026-124509: floci-io Floci path traversal in S3 bucket name validation

CVE-2026-124509 · Severity: high · CVSS 7.3 · Published 2026-11-09

Floci is a local AWS emulator that allows developers to test cloud applications without accounts or tokens. A path traversal vulnerability in S3 bucket name validation allows remote attackers to manipulate bucket names and access files outside the intended directory, potentially exposing stored data. The issue is fixed in version 2.2.0.

Technologies: Floci-Io Floci. Vendors: Floci-Io.

Quick answers

Is CVE-2026-124509 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-124509 being exploited in the wild.
How severe is CVE-2026-124509?
High severity, with a CVSS score of 7.3, published 9 November 2026.
Which products and versions are affected?
Floci-Io Floci up to 2.1.0.
Is there a fix for CVE-2026-124509?
Yes: fixed in 2.2.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-124509 attacked?
It is attacked over the network, in a software library.
Am I affected by CVE-2026-124509?
Check whether you run Floci-Io Floci at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: 2.2.0

Technical details

A path traversal vulnerability exists in the S3Destination.bucketName function within services/firehose/model/DeliveryStreamDescription.java. The vulnerability allows manipulation of the BucketARN argument to bypass bucket name validation and traverse the filesystem. An attacker can exploit this remotely without authentication by sending crafted bucket names to escape the account's storage root directory.

Affected products

  • floci-io Floci up to 2.1.0

Timeline

  • 2026-11-09: disclosed
  • 2026-11-09: patched: patch b986b95074ef524019be7af51e1df172e48faa4b

References

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