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TI-2020-01824 Aliases CVE-2020-1897GHSA-838g-g793-hh7g

Use after free in Meta proxygen

Priority MEDIUM 44CWE-416Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.01149 67th percentileScored 2026-11-07
Fix Fixed proxygen (Facebook): v2020.05.18.00

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Metaproxygenbefore v2020.05.18.00v2020.05.18.00Patch availableCNA
  • proxygen VendorMeta Affected before v2020.05.18.00 Fixed in v2020.05.18.00 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:facebook:proxygen:*:*:*:*:*:*:*:*before 2020.05.18.00VulnerableMeta
  • cpe:2.3:a:facebook:proxygen:*:*:*:*:*:*:*:* Versions before 2020.05.18.00 Vulnerable ·Meta

Remediation

  • Fix · CNA proxygen (Facebook) Fixed in v2020.05.18.00

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-1897
  2. 2026-10-03 Alias added: GHSA-838g-g793-hh7g

References

Advisory 1

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2019-08926 Out-of-bounds write in Meta Proxygen CVSS 3.0CRITICAL 9.8
  • TI-2019-08945 Use after free in Meta Proxygen CVSS 3.1CRITICAL 9.8
  • TI-2018-04667 NULL pointer dereference in Meta Proxygen CVSS 3.1HIGH 7.5
  • TI-2021-06346 Reachable assertion in Meta mvfst CVSS 3.1HIGH 7.5
  • TI-2025-34860 Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite… CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences