What’s Vulnerable › Vulnerabilities

CVE-2018-15503

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-08-18 · updated 2026-06-17
• Weakness: CWE-502

Description

The unpack implementation in Swoole version 4.0.4 lacks correct size checks in the deserialization process. An attacker can craft a serialized object to exploit this vulnerability and cause a SEGV.

Affected products

• Swoole: 4.0.4

References

• https://github.com/swoole/swoole-src/commit/4cdbce5d9bf2fe596bb6acd7d6611f9e8c253a76
• https://github.com/swoole/swoole-src/issues/1882
• https://x-c3ll.github.io/posts/swoole-deserialization-cve-2018-15503/
• https://github.com/swoole/swoole-src/commit/4cdbce5d9bf2fe596bb6acd7d6611f9e8c253a76
• https://github.com/swoole/swoole-src/issues/1882
• https://x-c3ll.github.io/posts/swoole-deserialization-cve-2018-15503/

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