CVE-2020-1897 - 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

Back Back to CVE browser

CRITICAL

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

Published May 18, 2020

9.8

CRITICAL

CVSS 3.1

EPSS 1.15%

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

Vendor Facebook Product Proxygen Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <v2020.05.18.00
- Version
  v2020.05.18.00
  Status
  unaffected
  Constraints
  <unspecified

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Facebook

Proxygen

n/a

Version	Status	Constraints
unspecified	affected	<v2020.05.18.00
v2020.05.18.00	unaffected	<unspecified

Remediation

No remediation recorded yet.

Metrics

1.15% 0.01149

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.

EPSS probability 0.01149

Score over time

2021-2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (12 key points)

Flat stretches are collapsed. Showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 3, 2026	1.15% (0.01149)	65.73th	v5 (v2026.06.15)
Sep 20, 2026	1.15% (0.01149)	65.42th	v5 (v2026.06.15)
Jul 20, 2024	0.22% (0.00222)	60.93th	v3 (v2023.03.01)
Jun 13, 2024	0.22% (0.00222)	60.63th	v3 (v2023.03.01)
Mar 7, 2023	0.22% (0.00222)	58.63th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Apr 1, 2022	0.89% (0.00885)	24.24th	v2 (v2022.01.01)
Feb 4, 2022	9.03% (0.09029)	86.86th	v2 (v2022.01.01)
Feb 3, 2022	1.84% (0.01840)	47.83th	v1
Jan 6, 2022	1.84% (0.01840)	47.32th	v1
Jan 5, 2022	0.42% (0.00416)	26.65th	v5 (v2026.06.15)
Apr 14, 2021	0.42% (0.00416)	0.00th	v1

Weaknesses (1)

CWE-416

Use After Free

References (1)

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

Link	Providers	Tags
https://www.facebook.com/security/advisories/cve-2020-1897		x_refsource_CONFIRMVendor Advisory

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner facebook

Published May 18, 2020

Updated Aug 4, 2024

Reserved Dec 2, 2019

Link CVE-2020-1897

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 17, 2026

Link CVE-2020-1897

Red Hat

Severity n/a

Public date n/a

Links CVE-2020-1897