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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

6.3 MediumFix available

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.

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
Low
Availability
None

Exploit likelihood

0.30%Down 0.2 points since Oct 3, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.3

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

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.

Record
CVE-2026-86536
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Weakness
CWE-1321
Updated
2026-11-02
EUVDEUVD-2026-91397 6.3

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.

Record
EUVD-2026-91397
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-9fmc-g2q8-p66m 6.3

Improperly controlled modification of object prototype attributes ('prototype pollution')...

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.

Record
GHSA-9fmc-g2q8-p66m
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-1321
Updated
2026-11-02
NVD 6.3

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.

Record
CVE-2026-86536
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness
CWE-1321
Updated
2026-11-02
OSVDEBIAN-CVE-2026-86536 6.3

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.

Record
DEBIAN-CVE-2026-86536
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated
2026-11-02
OSVRHSA-2026:74369 7.5

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Record
RHSA-2026:74369
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-86536 6.3

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.

Record
UBUNTU-CVE-2026-86536
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
Updated
2026-11-02
OSVAZL-105401 No score

CVE-2026-86536 affecting package thrift 0.24.0-1

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.

Record
AZL-105401
Updated
2026-11-02
OSVBIT-thrift-2026-86536 No score

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

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.

Record
BIT-thrift-2026-86536
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
thrift
Azure Linux:3
 through 0.24.0-1 None known
thrift
Bitnami
 before 0.25.0
0.25.0
thrift
Debian:12
 All versions, plus listed versions
0.17.0-20.17.0-30.17.0-40.18.1-10.18.1-2
Show 16 moreShow less
0.19.0-10.19.0-20.19.0-2.10.19.0-2.1~exp10.19.0-30.19.0-40.20.0-10.22.0-10.22.0-20.22.0-30.22.0-40.23.0-10.23.0-20.23.0-30.24.0-10.24.0-2
 None known
thrift
Debian:13
 All versions, plus listed versions
0.19.0-40.20.0-10.22.0-10.22.0-20.22.0-3
Show 6 moreShow less
0.22.0-40.23.0-10.23.0-20.23.0-30.24.0-10.24.0-2
 None known
thrift
Debian:14
 All versions, plus listed versions
0.19.0-40.20.0-10.22.0-10.22.0-20.22.0-3
Show 6 moreShow less
0.22.0-40.23.0-10.23.0-20.23.0-30.24.0-10.24.0-2
 None known
perl-thrift
Red Hat:hummingbird:1
From an advisory covering 29 CVEs
 before 0:0.25.0-0.1.hum1
0:0.25.0-0.1.hum1
python3-thrift
Red Hat:hummingbird:1
From an advisory covering 29 CVEs
 before 0:0.25.0-0.1.hum1
0:0.25.0-0.1.hum1
thrift
Red Hat:hummingbird:1
From an advisory covering 29 CVEs
 before 0:0.25.0-0.1.hum1
0:0.25.0-0.1.hum1
thrift-devel
Red Hat:hummingbird:1
From an advisory covering 29 CVEs
 before 0:0.25.0-0.1.hum1
0:0.25.0-0.1.hum1
thrift-glib
Red Hat:hummingbird:1
From an advisory covering 29 CVEs
 before 0:0.25.0-0.1.hum1
0:0.25.0-0.1.hum1
Show 6 moreShow less
Affected packages
PackageAffectedFixed
thrift-qt
Red Hat:hummingbird:1
From an advisory covering 29 CVEs
 before 0:0.25.0-0.1.hum1
0:0.25.0-0.1.hum1
thrift
Ubuntu:20.04:LTS
 All versions, plus listed versions
0.11.0-60.13.0-2build10.13.0-2build2
 None known
thrift
Ubuntu:22.04:LTS
 All versions, plus listed versions
0.13.0-6ubuntu10.13.0-6ubuntu20.13.0-6ubuntu30.13.0-70.16.0-2
 None known
thrift
Ubuntu:24.04:LTS
 All versions, plus listed versions
0.17.0-40.19.0-20.19.0-2build10.19.0-2.1build40.19.0-2.1build5
 None known
thrift
Ubuntu:26.10
 All versions, plus listed versions
0.22.0-3ubuntu10.23.0-30.23.0-3ubuntu1
 None known
thrift
Ubuntu:26.04:LTS
 All versions, plus listed versions
0.19.0-4build10.22.0-30.22.0-3ubuntu1
 None known

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2026-86536 is a medium vulnerability (CVSS 6.3) in Apache Software Foundation Thrift, published October 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. Fixed in thrift 0.25.0.

References

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