CVE-2026-55682: Information Disclosure (CVSS 8.1)

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.

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CVSS v3.1 Score

8.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0034

Probability of exploitation

0.26%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-200 CWE-200

CWE-384 CWE-384

References

Other References

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

Frequently Asked Questions

What is CVE-2026-55682? +

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. It has a CVSS v3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-55682? +

CVE-2026-55682 has a CVSS v3.1 score of 8.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0034, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-55682? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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