CVE-2026-81691
Received Received - Intake

OpenSSL Credential Exposure via Unencrypted Login URLs

Publication date: 2026-08-27

Last updated on: 2026-08-27

Assigner: VulnCheck

Description
openssl_encrypt versions before 1.4.9 fail to validate server URLs in login and register_with_email functions, accepting unencrypted http:// URLs and unconfigured hosts. Attackers on the network path can intercept cleartext credentials including client_id, passwords, and JWTs to achieve full keyserver account takeover.

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Meta Information

Published
2026-08-27
Last Modified
2026-08-27
Generated
2026-08-27
AI Q&A
2026-08-27
EPSS Evaluated
N/A
NVD
CVE-2026-81691
EUVD
EUVD-2026-67047

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
openssl openssl_encrypt to 1.4.9 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-319 The product transmits sensitive or security-critical data in cleartext in a communication channel that can be sniffed by unauthorized actors.

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Executive Summary

This vulnerability affects openssl_encrypt versions before 1.4.9. It fails to validate server URLs in login and register_with_email functions, accepting unencrypted http:// URLs and unconfigured hosts. Attackers on the network can intercept cleartext credentials like client_id, passwords, and JWTs to take over keyserver accounts.

Detection Guidance

Check for openssl_encrypt versions before 1.4.9 using package managers like npm or composer. Inspect application logs for login or registration requests to unencrypted http:// URLs or unconfigured hosts. Use network monitoring tools to detect cleartext credential transmissions.

Impact Analysis

If you use affected openssl_encrypt versions, attackers on your network can steal your credentials during login or registration. This could lead to unauthorized access to your keyserver account and potential misuse of your data.

Compliance Impact

This vulnerability likely violates compliance requirements for protecting sensitive data like passwords and JWTs. GDPR and HIPAA mandate encryption of personal and health data in transit, which this flaw fails to ensure.

Mitigation Strategies

Upgrade openssl_encrypt to version 1.4.9 or later. Enforce HTTPS in all login and registration functions. Configure server URL validation to reject unencrypted or unconfigured hosts. Review and update keyserver plugin configurations.

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