happyfish100 libfastcommon up to 1.0.84 src/base64.c base64_decode stack-based overflow

Summaryinfo

A vulnerability, which was classified as critical, was found in happyfish100 libfastcommon up to 1.0.84. Affected by this issue is the function base64_decode of the file src/base64.c. The manipulation results in stack-based overflow. This vulnerability was named CVE-2026-2016. The attack needs to be approached locally. In addition, an exploit is available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in happyfish100 libfastcommon up to 1.0.84. It has been classified as critical. Affected is the function base64_decode of the file src/base64.c. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-2016. The exploitability is told to be easy. Local access is required to approach this attack. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept.

Applying the patch 82f66af3e252e3e137dba0c3891570f085e79adf is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Vendor

• happyfish100

Name

• libfastcommon

Version

• 1.0.0
• 1.0.1
• 1.0.2
• 1.0.3
• 1.0.4
• 1.0.5
• 1.0.6
• 1.0.7
• 1.0.8
• 1.0.9
• 1.0.10
• 1.0.11
• 1.0.12
• 1.0.13
• 1.0.14
• 1.0.15
• 1.0.16
• 1.0.17
• 1.0.18
• 1.0.19
• 1.0.20
• 1.0.21
• 1.0.22
• 1.0.23
• 1.0.24
• 1.0.25
• 1.0.26
• 1.0.27
• 1.0.28
• 1.0.29
• 1.0.30
• 1.0.31
• 1.0.32
• 1.0.33
• 1.0.34
• 1.0.35
• 1.0.36
• 1.0.37
• 1.0.38
• 1.0.39
• 1.0.40
• 1.0.41
• 1.0.42
• 1.0.43
• 1.0.44
• 1.0.45
• 1.0.46
• 1.0.47
• 1.0.48
• 1.0.49
• 1.0.50
• 1.0.51
• 1.0.52
• 1.0.53
• 1.0.54
• 1.0.55
• 1.0.56
• 1.0.57
• 1.0.58
• 1.0.59
• 1.0.60
• 1.0.61
• 1.0.62
• 1.0.63
• 1.0.64
• 1.0.65
• 1.0.66
• 1.0.67
• 1.0.68
• 1.0.69
• 1.0.70
• 1.0.71
• 1.0.72
• 1.0.73
• 1.0.74
• 1.0.75
• 1.0.76
• 1.0.77
• 1.0.78
• 1.0.79
• 1.0.80
• 1.0.81
• 1.0.82
• 1.0.83
• 1.0.84

License

• open-source

Website

• Product: https://github.com/happyfish100/libfastcommon/

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #743873: happyfish100 libfastcommon V1.0.84 and earlier Heap-based Buffer Overflow (by liloler)

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