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CVE-2026-66858

Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: skip() does not apply the recursion limit (Python accelerator, PHP, Perl, Lua, Smalltalk, OCaml)

8.7 HighFix available

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries.

This issue affects Apache Thrift: before 0.25.0.

Users are recommended to upgrade to version 0.25.0, 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
None
Availability
High

Exploit likelihood

0.31%Unchanged since Oct 3, 2026
90%50%10%1%

What each source reports

CVE List Score used 8.7

Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: skip() does not apply the recursion limit (Python accelerator, PHP, Perl, Lua, Smalltalk, OCaml)

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries.

This issue affects Apache Thrift: before 0.25.0.

Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Record
CVE-2026-66858
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-674
Updated
2026-11-02
EUVDEUVD-2026-91585 8.7

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries.

This issue affects Apache Thrift: before 0.25.0.

Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Record
EUVD-2026-91585
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-hfqq-j57v-2292 8.7

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion...

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries.

This issue affects Apache Thrift: before 0.25.0.

Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Record
GHSA-hfqq-j57v-2292
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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-674
Updated
2026-11-02
NVD 8.7

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries.

This issue affects Apache Thrift: before 0.25.0.

Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Record
CVE-2026-66858
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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-674
Updated
2026-11-02
OSVDEBIAN-CVE-2026-66858 8.7

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Record
DEBIAN-CVE-2026-66858
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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-2026-66858 8.7

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries. This issue affects Apache Thrift: before 0.25.0. Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Record
UBUNTU-CVE-2026-66858
CVSS 4.0
8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
OSVAZL-105950 No score

CVE-2026-66858 affecting package thrift for versions less than 0.25.0-1

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries.

This issue affects Apache Thrift: before 0.25.0.

Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Record
AZL-105950
Updated
2026-11-02
OSVBIT-thrift-2026-66858 No score

Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: skip() does not apply the recursion limit (Python accelerator, PHP, Perl, Lua, Smalltalk, OCaml)

The protocol skip routine in several Apache Thrift bindings did not apply the binding's recursion limit, so a message that nests unknown fields deeply enough can exhaust the stack. Affected: the Python C++ accelerator (the pure-Python protocols are not affected), the PHP library and its thrift_protocol extension, and the Perl, Lua, Smalltalk and OCaml libraries.

This issue affects Apache Thrift: before 0.25.0.

Users are recommended to upgrade to version 0.25.0, which fixes the issue.

Record
BIT-thrift-2026-66858
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
thrift
Azure Linux:3
 before 0.25.0-1
0.25.0-1
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 10 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
php-horde-thrift
Ubuntu:16.04:LTS
 All versions, plus listed versions
2.0.2-22.0.2-32.0.2-3build1
 None known
python-thrift
Ubuntu:16.04:LTS
 All versions, plus listed versions
0.9.1-2
 None known
php-horde-thrift
Ubuntu:18.04:LTS
 All versions, plus listed versions
2.0.2-52.0.3-1
 None known
python-thrift
Ubuntu:18.04:LTS
 All versions, plus listed versions
0.9.1-2
 None known
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-2026-66858 is a high vulnerability (CVSS 8.7) 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 0.31%, the 23rd percentile. Fixed in thrift 0.25.0-1.

References

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