CVE-2025-11683
Unknown Unknown - Not Provided

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Vulnerability report for CVE-2025-11683, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2025-10-16

Last updated on: 2026-03-09

Assigner: CPANSec

Description

YAML::Syck versions before 1.36 for Perl has missing null-terminators which causes out-of-bounds read and potential information disclosure Missing null terminators in token.c leads to but-of-bounds read which allows adjacent variable to be read The issue is seen with complex YAML files with a hash of all keys and empty values.Β  There is no indication that the issue leads to accessing memory outside that allocated to the module.

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Meta Information

Published
2025-10-16
Last Modified
2026-03-09
Generated
2026-07-06
AI Q&A
2025-10-16
EPSS Evaluated
2026-07-05
NVD
EUVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
toddr yaml to 1.36 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

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Executive Summary

This vulnerability in YAML::Syck versions before 1.36 for Perl is caused by missing null terminators in the code, specifically in token.c. This leads to an out-of-bounds read, allowing the program to read adjacent variables in memory. The issue occurs with complex YAML files containing a hash of all keys with empty values. However, there is no indication that memory outside the module's allocated space is accessed.

Impact Analysis

The vulnerability can lead to potential information disclosure by reading adjacent variables in memory due to out-of-bounds reads. This could expose sensitive data processed by the YAML::Syck module when handling complex YAML files.

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