What’s Vulnerable › Vulnerabilities

CVE-2020-1897

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-05-18 · updated 2026-06-17
• Weakness: CWE-416

Description

A use-after-free is possible due to an error in lifetime management in the request adaptor when a malicious client invokes request error handling in a specific sequence. This issue affects versions of proxygen prior to v2020.05.18.00.

Affected products

• Facebook proxygen: before 2020.05.18.00 — fixed in 2020.05.18.00

How to fix

Upgrade to a fixed version: Facebook proxygen 2020.05.18.00. Check the vendor advisory for mitigations.

References

• https://www.facebook.com/security/advisories/cve-2020-1897
• https://www.facebook.com/security/advisories/cve-2020-1897

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