CVE-2026-81707
Received Received - Intake

OpenSSL Encrypt Email Field ANSI Escape Sequence Injection

Publication date: 2026-08-27

Last updated on: 2026-08-27

Assigner: VulnCheck

Description
openssl_encrypt before 1.4.9 fails to sanitize the email field of imported identity documents, allowing attackers to inject ANSI escape sequences that forge the fingerprint verification line displayed to users. Attackers can deliver a crafted identity bundle through normal contact-exchange flows or keyserver responses to manipulate terminal output and display a fraudulent fingerprint, bypassing the out-of-band verification mechanism that protects against key substitution attacks.

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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-2026-81707
EUVD
EUVD-2026-67063

Affected Vendors & Products

Currently, no data is known.

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-20 The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

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Executive Summary

The vulnerability in openssl_encrypt before 1.4.9 allows attackers to inject ANSI escape sequences into the email field of imported identity documents. This manipulation forges the fingerprint verification line shown to users, tricking them into believing a fraudulent fingerprint is legitimate.

Detection Guidance

This vulnerability involves ANSI escape sequence injection in the email field of imported identity documents via openssl_encrypt before 1.4.9. Detection requires inspecting terminal output for forged fingerprint verification lines or unexpected ANSI escape sequences in identity bundles.

Impact Analysis

Attackers can exploit this to bypass out-of-band verification, leading to key substitution attacks. This could allow unauthorized access or impersonation if users rely on the forged fingerprint for verification.

Compliance Impact

This vulnerability may violate compliance requirements that mandate secure identity verification and data integrity, such as GDPR's data protection principles or HIPAA's safeguards for sensitive information.

Mitigation Strategies

Immediately upgrade to openssl_encrypt version 1.4.9 or later to address the injection flaw. Additionally, review and sanitize all imported identity documents for ANSI escape sequences before processing.

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