What’s Vulnerable › Vulnerabilities

CVE-2020-23914

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-04-21 · updated 2026-06-17
• Weakness: CWE-476

Description

An issue was discovered in cpp-peglib through v0.1.12. A NULL pointer dereference exists in the peg::AstOptimizer::optimize() located in peglib.h. It allows an attacker to cause Denial of Service.

Affected products

• Cpp-Peglib Project Cpp-Peglib: through 0.1.12

References

• https://github.com/yhirose/cpp-peglib/commit/0061f393de54cf0326621c079dc2988336d1ebb3
• https://github.com/yhirose/cpp-peglib/issues/121
• https://github.com/yhirose/cpp-peglib/commit/0061f393de54cf0326621c079dc2988336d1ebb3
• https://github.com/yhirose/cpp-peglib/issues/121

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