CVE-2020-23914

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.

CVSS v3.1

5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v2.0

4.3 MEDIUMAV:N/AC:M/Au:N/C:N/I:N/A:P

EPSS

0.87% chance of exploitation in the next 30 days, 56th percentile

Published

2021-04-21

Updated

2024-08-04

Proof-of-concept exploits (1)

• yhirose/cpp-peglib/issues/121

References

• CVE Record
• NVD entry

Related

• CVE-2020-11709
• CVE-2020-23915
• CVE-2025-46728
• CVE-2025-53628
• CVE-2025-53629
• CVE-2020-23912