CVE-2020-7768

Prototype Pollution

7.5 HighFix available

The package grpc before 1.24.4; the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

4.03%Up 2.8 points since Apr 14, 2021

What each source reports

CVE List Score used 7.5

Prototype Pollution

The package grpc before 1.24.4; the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.

Record: CVE-2020-7768
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
Updated: 2026-11-02

EUVDEUVD-2021-1152 7.5

The package grpc before 1.24.4; the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.

Record: EUVD-2021-1152
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
Updated: 2026-11-03

GitHub AdvisoriesGHSA-pp75-xfpw-37g9 7.5

Prototype pollution in grpc and @grpc/grpc-js

"The package grpc before 1.24.4 and the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition."

Record: GHSA-pp75-xfpw-37g9
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-915, CWE-1321
Updated: 2026-11-02

NVD 7.5

The package grpc before 1.24.4; the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.

Record: CVE-2020-7768
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-1321
Updated: 2026-11-02

OSV 9.8

The package grpc before 1.24.4; the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.

Record: CVE-2020-7768
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-pp75-xfpw-37g9 7.5

Prototype pollution in grpc and @grpc/grpc-js

"The package grpc before 1.24.4 and the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition."

Record: GHSA-pp75-xfpw-37g9
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-1321, CWE-915
Updated: 2026-11-02

OSVCLSA-2026-1793796156 No score

TuxCare security update for @grpc/grpc-js (4 CVEs)

TuxCare rebuilt @grpc/grpc-js to address 4 CVEs. Fixed in 0.6.9-tuxcare.2.

Record: CLSA-2026-1793796156
Updated: 2026-11-04

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`grpc` npm	before 1.24.4	1.24.4
`@grpc/grpc-js` npm	before 1.1.8	1.1.8
`@grpc/grpc-js` TuxCare:npm From an advisory covering 4 CVEs	0.6.9-tuxcare.0 up to 0.6.9-tuxcare.2, plus listed versions 0.6.90.6.9-tuxcare.1	0.6.9-tuxcare.2

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected
Nov 4, 2026	affected, aliases, facts	OSV
Nov 3, 2026	aliases, products, published	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-7768 is a high vulnerability (CVSS 7.5) in Google Grpc, published November 11, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.03%, the 90th percentile. Fixed in grpc 1.24.4.

References

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