Prototype Pollution

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Summary

CVECVE-2020-7788
StatePUBLISHED
Assignersnyk
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-12-11 11:15:11 UTC
Updated2026-10-08 22:17:03 UTC
DescriptionThis affects the package ini before 1.3.6. If an attacker submits a malicious INI file to an application that parses it with ini.parse, they will pollute the prototype on the application. This can be exploited further depending on the context.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

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

EPSS: 0.036550000 probability, percentile 0.894960000 (date 2026-10-20)

Problem Types: CWE-1321 | Prototype Pollution

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary7.3HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED7.3HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P
2.0[email protected]Primary7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:L/Au:N/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 9.0 All All All
Application Ini Project Ini All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Ini affected unspecified 1.3.6 custom Not specified

References

ReferenceSourceLinkTags
Prototype Pollution in ini | Snyk af854a3a-2127-422b-91ae-364da2661108 snyk.io Exploit, Third Party Advisory
[SECURITY] [DLA 2503-1] node-ini security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
do not allow invalid hazardous string as section name · npm/ini@56d2805 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com Patch, Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Eugene Lim (en)

CNA: Government Technology Agency Cyber Security Group (en)

Legacy QID Mappings

  • 159554 Oracle Enterprise Linux Security Update for nodejs:16 (ELSA-2021-5171)
  • 159622 Oracle Enterprise Linux Security Update for nodejs:14 (ELSA-2022-0350)
  • 160111 Oracle Enterprise Linux Security Update for nodejs and nodejs-nodemon (ELSA-2022-6595)
  • 239590 Red Hat Update for rh-nodejs12-nodejs and rh-nodejs12-nodejs-nodemon (RHSA-2021:3281)
  • 239591 Red Hat Update for rh-nodejs14-nodejs and rh-nodejs14-nodejs-nodemon (RHSA-2021:3280)
  • 239970 Red Hat Update for nodejs:16 security (RHSA-2021:5171)
  • 240037 Red Hat Update for nodejs:14 security (RHSA-2022:0246)
  • 240051 Red Hat Update for nodejs:14 security (RHSA-2022:0350)
  • 240676 Red Hat Update for nodejs and nodejs-nodemon (RHSA-2022:6595)
  • 377388 Alibaba Cloud Linux Security Update for nodejs:14 (ALINUX3-SA-2021:0016)
  • 377422 Alibaba Cloud Linux Security Update for nodejs:14 (ALINUX3-SA-2022:0014)
  • 940231 AlmaLinux Security Update for nodejs:10 (ALSA-2021:0548)
  • 940253 AlmaLinux Security Update for nodejs:12 (ALSA-2021:0549)
  • 940254 AlmaLinux Security Update for nodejs:14 (ALSA-2021:0551)
  • 940355 AlmaLinux Security Update for nodejs:16 (ALSA-2021:5171)
  • 940448 AlmaLinux Security Update for nodejs:14 (ALSA-2022:0350)
  • 940678 AlmaLinux Security Update for nodejs and nodejs-nodemon (ALSA-2022:6595)
  • 960322 Rocky Linux Security Update for nodejs:16 (RLSA-2021:5171)
  • 960531 Rocky Linux Security Update for nodejs and nodejs-nodemon (RLSA-2022:6595)
  • 960749 Rocky Linux Security Update for nodejs:14 (RLSA-2021:0551)
  • 960803 Rocky Linux Security Update for nodejs:12 (RLSA-2021:0549)
  • 960843 Rocky Linux Security Update for nodejs:10 (RLSA-2021:0548)
  • 960863 Rocky Linux Security Update for nodejs:14 (RLSA-2022:0350)
  • 983801 Nodejs (npm) Security Update for ini (GHSA-qqgx-2p2h-9c37)

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