# AWS SDK for Java 2.0: Improper Handling of Special Characters in CloudFront Signing Utilities

Advisory record · `GHSA-443w-3rq3-5m5h`

- **Identifiers:** `GHSA-443w-3rq3-5m5h`
- **State:** Confirmed
- **Severity:** CVSS 4.0, no score published
- **Critical:** No
- **Weakness (CWE):** [CWE-20](https://cwe.mitre.org/data/definitions/20.html) · [CWE-116](https://cwe.mitre.org/data/definitions/116.html)
- **Tags:** [CWE-20](https://agentprime.io/advisories/tag/cwe-20.md) · [CWE-116](https://agentprime.io/advisories/tag/cwe-116.md)
- **Published:** 27 Mar 2026
- **Updated:** 10 Sept 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 27 Mar 2026, 20:43 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `software.amazon.awssdk:cloudfront` (Maven): affected `>=2.18.33, <2.41.30`; fixed in `2.41.30`

## Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

> The software.amazon.awssdk:cloudfront package, versions 2.18.33 through 2.41.29, does not properly handle special characters such as double quotes and backslashes in input passed to its CloudFront signing utilities. If an application passes unsanitized input to these utilities, the generated signed URL or cookie policy may not reflect the intended access restrictions. Upgrade to version 2.41.30. The source advises validating input in application code before passing it to these utilities.

Written 2 Nov 2026.

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- Score not published, CVSS 4.0: `CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:N/SA:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** No score.

## Timeline

- 31 Oct 2026, 14:17 UTC: First seen by agentprime
- 31 Oct 2026, 14:17 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-443w-3rq3-5m5h)

## Sources

- [GitHub Advisory Database: GHSA-443w-3rq3-5m5h](https://github.com/advisories/GHSA-443w-3rq3-5m5h)
- [OSV: GHSA-443w-3rq3-5m5h](https://osv.dev/vulnerability/GHSA-443w-3rq3-5m5h)
- <https://github.com/aws/aws-sdk-java-v2/security/advisories/GHSA-443w-3rq3-5m5h>
- <https://docs.aws.amazon.com/sdk-for-java/latest/developer-guide/security.html>
- <https://github.com/aws/aws-sdk-java-v2>
- <https://github.com/aws/aws-sdk-java-v2/blob/master/services/cloudfront/src/main/java/software/amazon/awssdk/services/cloudfront/CloudFrontUtilities.java>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-443w-3rq3-5m5h>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-443w-3rq3-5m5h/>. Everything for agents: <https://agentprime.io/llms.txt>.