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Flex Agent release notes

Flex Agent 1.16.0

Release date: April 29, 2026

Language versions currently supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • If the attach_all_unknown_processes option is used to instrument .NET Core processes, a warning is logged. (CFA-462)

  • On agent download, file permissions are explicitly set, rather than relying on parent directory permissions, to ensure all applications have read access to the agent. (CFA-460)

  • On agent attachment, the Flex Agent provides a Flex UUID & Process Fingerprint for the language Agent to forward to the backend. (CFA-496)

  • The CLI no longer requires root permissions to run; however, it will warn if a non-root user performs an action that may have unexpected results under lower permissions. (CFA-505)

  • The Flex Agent includes these agent versions:

    • .NET Core: 5.0.6

    • Java: 6.28.0

    • Node.js: 5.55.0

    • PHP: 1.51.0

    • Python: 11.2.0

Bug fixes:

  • The buffer used to read comms files did not properly bound the read to ensure a null byte at the end of the read String. (CFA-506)

Flex Agent 1.15.0

Release date: April 15, 2026

Language versions currently supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • Previously, the Flex Agent allowed users to disable the integrity check on language agent downloads. That is no longer an optional part of the agent download. (CFA-463)

  • Agent attachment now honors environment variables, in addition to file markers, when deciding if an attempt should be made to attach to a given language. (CFA-474)

  • Expand the details provided by the apps command to show what technologies the application is using. (CFA-475)

  • The Flex Agent includes these agent versions:

    • .NET Core: 5.0.5

    • Java: 6.27.0

    • Node.js: 5.53.1

    • PHP: 1.50.0

    • Python: 11.0.0 – With this major change, Python 3.9 will no longer be supported.

Flex Agent 1.14.0

Release date: April 1, 2026

Language versions currently supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • The apps command now includes the PPID in its output.

  • The system-info command now includes the host’s IPs. (CFA-445)

  • The apps command for individual applications now includes Linux proc memory. (CFA-457)

  • The system-info command now includes host memory information and a --full option to report agent and process information. (CFA-454)

  • The AWS CLI is now excluded from attachment logic, no longer instrumented by the Python agent. (CFA-465)

  • All dependencies are now pinned to the exact version rather than the caret version against patches. (CFA-468)

  • The Flex Agent includes these agent versions:

    • .NET Core: 5.0.4

    • Java: 6.27.0

    • Node.js: 5.52.1

    • PHP: 1.50.0

    • Python: 10.26.0

Flex Agent 1.13.0

Release date: March 5, 2026

Language versions currently supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • The Flex Agent now runs connection testing to confirm reachability from the host machine to Contrast infrastructures as part of the installation process. (CFA-310)

  • The Flex Agent includes these agent versions:

    • .NET Core: 5.0.2

    • Java: 6.26.0

    • Node.js: 5.52.0

    • PHP: 1.49.0

    • Python: 10.26.0

Bug fixes:

  • The Flex Agent now properly identifies Python processes instrumented by the Python agent when the runner is used, avoiding replacing the directly invoked Python agent. (CFA-434)

Flex Agent 1.12.0

Release date: February 13, 2026

Languages supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • The Flex Agent now offers connection testing to confirm reachability from the host machine to Contrast infrastructures. (CFA-394)

  • The Flex Agent includes these agent versions:

    • .NET Core: 5.0.1

    • Java: 6.26.0

    • Node.js: 5.51.0

    • PHP: 1.48.0

    • Python: 10.25.0

Flex Agent 1.11.0

Release date: January 28, 2026

Languages supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • The Flex Agent CLI now includes the agent-configcommand that lets you manage agent configuration settings. (CFA-301)

  • The Flex Agent includes these agent versions:

    • .NET Core: 5.0.0

    • Java: 6.25.1

    • Node.js: 5.50.1

    • PHP: 1.48.0

    • Python: 10.23.1

Archive

January 2025 - December 2025

Flex Agent 1.9.0

Release date: December 10, 2025

Languages supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • The Flex Agent now supports Alpine Package Keeper apk-tools 3.0 architecture validation. (CFA-381, CFA-382).

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.8.0

    • Java: 6.23.0

    • Node.js: 5.48.0

    • PHP: 1.47.0

    • Python: 10.22.0

Flex Agent 1.8.0

Release date: December 2, 2025

Languages supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • Improved PHP process detection and attachment filtering. (CFA-112)

  • Introduced the beta diagnostics command. (CFA-339)

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.8.0

    • Java: 6.23.0

    • Node.js: 5.47.0

    • PHP: 1.47.0

    • Python: 10.21.0

Flex Agent 1.7.0

Release date: November 20, 2025

Languages supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • Improved PHP process detection and attachment filtering. (CFA-112)

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.8.0

    • Java: 6.23.0

    • Node.js: 5.47.0

    • PHP: 1.47.0

    • Python: 10.21.0

Flex Agent 1.6.0

Release date: November 5, 2025

Languages supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • Added support for Docker image attachments from the host. (CFA-263)

  • Renamed the service to contrast-flex and removed tbe symlink. (CFA-327)

  • The Flex Agent identifies Kotlin applications as part of the apps command. (CFA-335)

  • The Flex Agent identifies Scala applications as part of the apps command. (CFA-336)

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.6.0

    • Java: 6.22.1

    • Node.js: 5.47.0

    • PHP: 1.46.0

    • Python: 10.18.0

Flex Agent 1.5.0

Release date: October 16, 2025

Languages supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • The Flex Agent now generates Alpine Package Keeper (APK) artifacts. (CFA-313)

  • The Flex Agent identifies PHP applications as part of the apps command. (CFA-288)

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.5.2

    • Java: 6.22.0

    • Node.js: 5.45.1

    • PHP: 1.46.0

    • Python: 10.17.0

Flex Agent 1.4.0

Release date: September 17, 2025

Languages supported: .NET Core, Java, Node.js, PHP, and Python

New and improved:

  • The Flex Agent now has full support for attaching the PHP agent to applications. (CFA-140)

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.5.1

    • Java: 6.20.1

    • Node.js: 5.42.0

    • PHP: 1.45.0

    • Python: 10.16.0

Flex Agent 1.3.0

Release date: September 3, 2025

Languages supported: .NET Core, Java, Node.js, and Python

Beta languages supported: PHP

New and improved:

  • The Flex Agent now has Beta support for attaching the PHP agent to applications. (CFA-141)

  • The Flex Agent now includes an uninstallation script. (CFA-251)

  • The Flex Agent has reduced the size of the bundled .NET Core agent. (CFA-254)

  • The Flex Agent now uses the base maven repo when specifying where to pull the Java agent. (CFA-281)

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.5.1

    • Java: 6.20.1

    • Node.js: 5.42.0

    • PHP: 1.45.0

    • Python: 10.12.0

Bug fixes:

  • Fixed an issue where the REPL wasn't ignored when determining if a Python process should be instrumented,. (CFA-276)

  • Fixed an issue where an extra separator character was added to the PYTHONPATH when attaching to a Python process. (CFA-278 and CFA-278).

Flex Agent 1.2.2

Release date: August 12, 2025

Languages supported: .NET Core, Java, Node.js, and Python

New and improved:

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.5.0

    • Java: 6.20.1

    • Node.js: 5.42.0

    • Python: 10.12.0

Bug fixes:

  • Fixed an issue where existing attach settings were overwritten when the agent installed the injector. (CFA-256)

Flex Agent 1.2.1

Release date: August 8, 2025

Languages supported: .NET Core, Java, Node.js, and Python

New and improved:

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.5.0

    • Java: 6.20.1

    • Node.js: 5.41.0

    • Python: 10.12.0

Bug fixes:

  • Fixed an issue where the auto-attach command in the script failed to execute when running the installation in unattached mode. (CFA-250)

Flex Agent 1.2.0

Release date: August 7, 2025

Languages supported: .NET Core, Java, Node.js, and Python

New and improved:

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.5.0

    • Java: 6.20.1

    • Node.js: 5.41.0

    • Python: 10.12.0

Flex Agent 1.1.0

Release date: July 28, 2025

Languages supported: .NET Core, Java, Node.js, and Python

New and improved:

  • When downloading the agents, Flex Agent verifies the file integrity with hashes that public repositories provide. (CFA-196)

  • You can now pin a specific Contrast agent to a specific instrumented process. (CFA-242)

  • You can now specify the maximum allowed agent version for each Contrast agent. (CFA-183)

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.4.5

    • Java: 6.19.0

    • Node.js: 5.40.1

    • Python: 10.11.0

Flex Agent 1.0.0

Release date: July 15, 2025

Languages supported: .NET Core, Java, Node.js, and Python

New and improved:

  • First release of the Flex Agent. This agent lets you install multiple Contrast agents for different languages with a single package. It also helps automate the agent update process. You can use an agent wizard for installation or install it manually.

  • The Flex Agent includes these agent versions:

    • .NET Core: 4.4.3

    • Java: 6.19.0

    • Node.js: 5.39.1

    • Python: 10.11.0

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