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CVE-2026-86536

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

MEDIUM

6.3

CVSS Score

Published: October 2, 2026 at 11:40 AM UTC

Updated: October 2, 2026 at 06:17 PM UTC

1 product affected across 1 vendorThrift

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Severity

MEDIUM6.3

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Thrift · Apachepypi

60%

v < 0.25.0

Affected range stops below 0.25.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

Vendor Advisory

Source: cverecord

https://lists.apache.org/thread/33otcgbqd27wf6qq810q56znzbomnhg1

Vendor Advisory

Source: cverecord

https://lists.apache.org/thread/xckvfky30kdnk8vqnhy0wndthvc9nymp

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.3MEDIUMapache

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-1321

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