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CVE-2026-91135

Apache Thrift: C++ `THeaderTransport::transform()` heap buffer overflow (write direction)

9.2 CriticalFix available

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport.

When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer.

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
High
Integrity
High
Availability
High

Exploit likelihood

0.34%Down 0.1 points since Oct 3, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.2

Apache Thrift: C++ `THeaderTransport::transform()` heap buffer overflow (write direction)

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport.

When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer.

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-2026-91135
CVSS 4.0
9.2 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness
CWE-122
Updated
2026-11-02
EUVDEUVD-2026-91374 9.2

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport.

When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer.

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-2026-91374
CVSS 4.0
9.2 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-3gv9-wqfp-2rf3 9.2

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport. When an...

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport.

When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer.

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-3gv9-wqfp-2rf3
CVSS 4.0
9.2 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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-122
Updated
2026-11-02
NVD 9.2

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport.

When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer.

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-2026-91135
CVSS 4.0
9.2 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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-122
Updated
2026-11-02
OSVDEBIAN-CVE-2026-91135 9.2

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport. When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer. 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-2026-91135
CVSS 4.0
9.2 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/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
OSVUBUNTU-CVE-2026-91135 9.2

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport. When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer. 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-2026-91135
CVSS 4.0
9.2 CriticalCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated
2026-11-02
OSVAZL-105425 No score

CVE-2026-91135 affecting package thrift for versions less than 0.25.0-1

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport.

When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer.

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-105425
Updated
2026-11-02
OSVBIT-thrift-2026-91135 No score

Apache Thrift: C++ `THeaderTransport::transform()` heap buffer overflow (write direction)

Heap-based buffer overflow vulnerability in Apache Thrift C++ THeaderTransport.

When an application enables the ZLIB transform for the frames it sends, THeaderTransport::transform() copies the compressed frame into the write buffer without making sure it fits. Data that does not compress, such as content a remote peer supplied, grows under compression, so the copy writes past the end of the heap buffer by an amount that grows with the size of the frame, and for large frames it also reads past the end of the transform buffer.

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-2026-91135
Updated
2026-11-02
OSVopenSUSE-SU-2026:12051-1 No score

libthrift-0_25_0-0.25.0-1.1 on GA media

These are all security issues fixed in the libthrift-0_25_0-0.25.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:12051-1
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
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
thrift
openSUSE:Tumbleweed
From an advisory covering 33 CVEs
before 0.25.0-1.1
0.25.0-1.1

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-2026-91135 is a critical vulnerability (CVSS 9.2) 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 0.34%, the 27th percentile. Fixed in thrift 0.25.0-1.

References

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