CVE-2021-47986Network attack vector

Unreviewed code execution via incorrect Git tags

Published Jun 25, 2026 · Updated Jun 25, 2026

Supply-chain exposure in Parse Server before 4.10.0 allows attackers to run unreviewed code through dependencies pinned to incorrect Git tags. Repository tags for named versions resolved to a contributor's personal fork rather than reviewed Parse Platform code, so dependency resolution installed that fork. Exposure requires a Git-tag dependency or the Bitnami 4.9.3 image; no npm release used the tags, and the vendor found no malicious code.

CVSS severity7.7
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Supply-chain exposure in Parse Server before 4.10.0 allows attackers to run unreviewed code through dependencies pinned to incorrect Git tags. Repository tags for named versions resolved to a contributor's personal fork rather than reviewed Parse Platform code, so dependency resolution installed that fork. Exposure requires a Git-tag dependency or the Bitnami 4.9.3 image; no npm release used the tags, and the vendor found no malicious code.

The record

CVE
CVE-2021-47986
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Parse Platform
Product
Parse Server
Classifications
CWE-494, T1195.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <4.10.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Parse Platform · Parse Serverversion=0 <4.10.0

Published CVSS scores

7.7VulnCheckCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.5VulnCheckCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-494Download of Code Without Integrity Check
T1195.001Compromise Software Dependencies and Development Tools

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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