CVE-2026-8463

Published: Mag 13, 2026 Last Modified: Mag 13, 2026

ExploitDB:

Other exploit source:

Google Dorks:

Description

AI Translation Available

Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2_verify on empty encoded input.

The auto-detect form of argon2_verify passes encoded_len - 1 as the length argument to memchr without checking that encoded_len is non-zero. When the encoded string is empty, the size_t subtraction underflows to SIZE_MAX and memchr scans adjacent heap memory looking for a '$' separator byte.

A caller that invokes argon2_verify against a stored hash that may legitimately be empty (for example a placeholder row or a NULL column materialised as an empty string) reads out-of-bounds heap memory, which can crash the process or leak the position of an adjacent '$' byte into subsequent parsing.

126

Buffer Over-read

Draft

Abstraction: Variant Structure: Simple

Common Consequences

Security Scopes Affected:

Confidentiality Availability Integrity

Potential Impacts:

Read Memory Bypass Protection Mechanism Dos: Crash, Exit, Or Restart

Applicable Platforms

Languages: C, C++, Memory-Unsafe

View CWE Details

191

Integer Underflow (Wrap or Wraparound)

Draft

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Availability Integrity Confidentiality Access Control

Potential Impacts:

Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Instability Modify Memory Execute Unauthorized Code Or Commands Bypass Protection Mechanism