CVE-2026-55971 Apache Thrift: C++ ZLIB heap buffer overflow (write) in THeaderTransport::untransform()
Critical 9.3
Published
Updated
Check this codebase for CVE-2026-55971 and fix it if it is affected.
What it is: CVE-2026-55971 is a critical memory corruption vulnerability in Apache Thrift, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-55971 in the wild and no public exploit code.
Affected packages and fixed versions:
- thrift (Bitnami): affected all versions; fixed in 0.24.0
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-55971/ (Markdown: https://insights.sbomify.com/CVE-2026-55971/index.md)
A heap buffer overflow in Apache Thrift C++ bindings allows attackers to execute arbitrary code or cause denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-55971?
CVE-2026-55971 is a critical memory corruption vulnerability in Apache Thrift, published on 27 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Heap-based Buffer Overflow vulnerability in Apache Thrift C++ bindings.
This issue affects Apache Thrift: before 0.24.0.
Users are recommended to upgrade to version 0.24.0, which fixes the issue.
Weakness: CWE-122
Which versions are affected by CVE-2026-55971?
1 open source package ship an affected version, including thrift. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
thrift Bitnami | All versions | 0.24.0 |
Linux distribution packages (36)
perl-thrift Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
python3-thrift Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
python3-thrift-debuginfo Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
thrift Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-debuginfo Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-debugsource Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-devel Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-devel-debuginfo Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-glib Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-glib-debuginfo Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-qt Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-qt-debuginfo Red Hat:enterprise_linux_ai:3.4::el9 | All versions | 0:0.24.0-1.el9ai |
perl-thrift Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
python3-thrift Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
python3-thrift-debuginfo Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
thrift Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-debuginfo Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-debugsource Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-devel Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-devel-debuginfo Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-glib Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-glib-debuginfo Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-qt Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
thrift-qt-debuginfo Red Hat:enterprise_linux_ai:3.5::el9 | All versions | 0:0.24.0-1.el9ai |
perl-thrift Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
python3-thrift Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
python3-thrift-debuginfo Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
thrift Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
thrift-debuginfo Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
thrift-debugsource Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
thrift-devel Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
thrift-devel-debuginfo Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
thrift-glib Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
thrift-glib-debuginfo Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
thrift-qt Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
thrift-qt-debuginfo Red Hat:enterprise_linux_ai:3.6::el9 | All versions | 0:0.24.0-2.el9ai |
Products include Apache Thrift.
How do I fix CVE-2026-55971?
Upgrade thrift to 0.24.0 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-55971 being exploited?
There is no known exploitation of CVE-2026-55971 in the wild and no public exploit code.
Other vulnerabilities in Apache Thrift
- CVE-2026-48144 Apache Thrift: c_glib TLS Client Missing Hostname Verification
- CVE-2016-5397 Apache Thrift Go Library Command Injection
- CVE-2026-43871 Apache Thrift, Apache Thrift, Apache Thrift, Apache Thrift: TCompactProtocol varint byte-count limit
- CVE-2026-48586 Denial of service in Apache Thrift
- CVE-2026-55968 Apache Thrift: Node.js quadratic-time DoS in server receive transports
Sources
Also known as AZL-94007, BIT-thrift-2026-55971, DEBIAN-CVE-2026-55971, ECHO-bda0-5769-1551, GHSA-gwj4-q93m-wwqc, MINI-qhx4-gcx9-4fpg and 4 more.