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Vulnerability record · CVE-2020-1897 · published 18 May 2020

CVE-2020-1897: Facebook proxygen use after free vulnerability

Facebook · Proxygen

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.

9.8 CVSS 3.1 Critical EPSS 1.1% · top 34.4% CWE-416 · Use after free
9.8CVSS 3.1 base score, v2 7.5
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.facebook.com/security/advisories/cve-2020-1897 Vendor Advisory
https://www.facebook.com/security/advisories/cve-2020-1897 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2020-1897), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.