# Apache Xalan Java XSLT library integer truncation issue when processing malicious XSLT stylesheets

Advisory record · `GHSA-9339-86wc-4qgf`

- **Identifiers:** `GHSA-9339-86wc-4qgf` · `BIT-java-2022-34169` · `BIT-java-min-2022-34169` · `BIT-jre-2022-34169` · `CVE-2022-34169`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** Yes: CVSS 7+ and EPSS
- **Weakness (CWE):** [CWE-681](https://cwe.mitre.org/data/definitions/681.html)
- **Tags:** [CWE-681](https://agentprime.io/advisories/tag/cwe-681.md)
- **Published:** 20 Jul 2022
- **Updated:** 8 May 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 20 Jul 2022, 00:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Critical

Critical, because:

- CVSS score 7.5 (7.0 or more) and EPSS 0.82 (0.1 or more): a high score and a real chance of exploitation in the next 30 days.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected packages

- `xalan:xalan` (Maven): affected `<2.7.3`; fixed in `2.7.3`

## Machine-written summary

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

> Apache Xalan Java (xalan:xalan) versions before 2.7.3 are vulnerable. An attacker who can supply a malicious XSLT stylesheet for processing can trigger an integer truncation that corrupts Java class files generated by the internal XSLTC compiler, allowing execution of arbitrary Java bytecode. Upgrade to xalan:xalan 2.7.3 or later.

Written 3 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

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`, from GitHub Advisory Database

- **CISA KEV:** Not listed.
- **EPSS:** 0.82, the 99th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:20 UTC: First seen by agentprime
- 31 Oct 2026, 14:20 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-9339-86wc-4qgf)

## Sources

- [GitHub Advisory Database: GHSA-9339-86wc-4qgf](https://github.com/advisories/GHSA-9339-86wc-4qgf)
- [OSV: GHSA-9339-86wc-4qgf](https://osv.dev/vulnerability/GHSA-9339-86wc-4qgf)
- <https://nvd.nist.gov/vuln/detail/CVE-2022-34169>
- <https://xalan.apache.org/>
- <https://www.oracle.com/security-alerts/cpujul2022.html>
- <https://www.debian.org/security/2022/dsa-5256>
- <https://www.debian.org/security/2022/dsa-5192>
- <https://www.debian.org/security/2022/dsa-5188>
- <https://security.netapp.com/advisory/ntap-20240621-0006>
- <https://security.netapp.com/advisory/ntap-20220729-0009>
- <https://security.gentoo.org/glsa/202401-25>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YULPNO3PAWMEQQZV2C54I3H3ZOXFZUTB>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L3XPOTPPBZIPFBZHQE5E7OW6PDACUMCJ>
- <https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KO3DXNKZ4EU3UZBT6AAR4XRKCD73KLMO>

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-9339-86wc-4qgf>, 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-9339-86wc-4qgf/>. Everything for agents: <https://agentprime.io/llms.txt>.