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CVE-2026-94636

Apache Thrift: Python `TZlibTransport` stops enforcing its decompressed-size limit once the limit is exactly used up

HIGH
8.2
CVSS Score
Published: October 2, 2026 at 11:47 AM UTC
Updated: October 2, 2026 at 06:17 PM UTC
1 product affected across 1 vendorThrift

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Severity
HIGH8.2
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

Improper handling of highly compressed data (data amplification), Function call with incorrectly specified arguments, Improper validation of specified quantity in input vulnerability in Apache Thrift py bindings. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, 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/1rpq0d0g6yzjjzl1z27lwmvhzkn6rbrs

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

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

CVSS

8.2HIGHapache
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-409CWE-628CWE-1284

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