CVE-2026-86536 PUBLISHED

Apache Thrift, Apache Thrift, Apache Thrift: A map key from the wire can replace a decoded object's prototype in generated JavaScript

Assigner: apache
Reserved: 07.09.2026 Published: 02.10.2026 Updated: 02.10.2026

Improperly controlled modification of object prototype attributes ('prototype pollution') vulnerability in Apache Thrift all JS bindings.

This issue affects Apache Thrift: before 0.25.0.

Users are recommended to upgrade to version 0.25.0 and re-generate JS code, which fixes the issue.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CVSS Score: 6.3

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	Low	Integrity	None
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	None
User Interaction	None

CVSS 4.0

Vendor	Apache Software Foundation
Product	Apache Thrift
Versions	Default: unaffected affected from 0 to 0.25.0 (excl.)

Vendor	Apache Software Foundation
Product	Apache Thrift
Versions	Default: unaffected affected from 0 to 0.25.0 (excl.)

Vendor	Apache Software Foundation
Product	Apache Thrift
Versions	Default: unaffected affected from 0 to 0.25.0 (excl.)

The ASF -- found using Claude agents to study the security of open-source projects, validated and reported by Apache Thrift. finder

CWE-1321 Improperly controlled modification of object prototype attributes ('prototype pollution') CWE