CVE-2022-35411 — Vulnerability in rpc-py — CVE Details
CRITICAL
rpc.py vulnerable to Deserialization of Untrusted Data
Published June 29, 2026Updated July 1, 2026Source: osv
Summary
rpc.py through 0.6.0 allows Remote Code Execution because an unpickle occurs when the "serializer: pickle" HTTP header is sent. In other words, although JSON (not Pickle) is the default data format, an unauthenticated client can cause the data to be processed with unpickle.
[Per the maintainer](https://github.com/abersheeran/rpc.py/issues/22), rpc.py is not designed for an API that is open to the outside world, and external requests cannot reach rpc.py in real world use.
A [fix](https://github.com/abersheeran/rpc.py/commit/491e7a841ed9a754796d6ab047a9fb16e23bf8bd) exists on the `master` branch. As a workaround, use the following code to turn off pickle in older versions:
```
del SERIALIZER_NAMES[PickleSerializer.name]
del SERIALIZER_TYPES[PickleSerializer.content_type]
Advisory Timeline
- First published June 29, 2026 (105 days ago).
- Last revised July 1, 2026 — 2 days after initial publication.
Affected Packages (1)
Affects 1 ecosystem: pypi (1).
| Package | Ecosystem | Affected | Fixed In |
|---|---|---|---|
| rpc-py | pypi | 0.4.2, 0.4.3, 0.5.0, 0.5.1 (+1 more) | Range-based data available |
CVSS Score Breakdown
What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://nvd.nist.gov/vuln/detail/CVE-2022-35411ADVISORY
- https://github.com/abersheeran/rpc.py/issues/22WEB
- https://github.com/abersheeran/rpc.py/commit/491e7a841ed9a754796d6ab047a9fb16e23bf8bdWEB
- https://github.com/abersheeran/rpc.pyPACKAGE
- https://github.com/ehtec/rpcpy-exploitWEB
- https://medium.com/%40elias.hohl/remote-code-execution-0-day-in-rpc-py-709c76690c30WEB
- https://medium.com/@elias.hohl/remote-code-execution-0-day-in-rpc-py-709c76690c30WEB
- https://packetstormsecurity.com/files/167872/rpc.py-0.6.0-Remote-Code-Execution.htmlWEB
- https://pypi.org/project/rpc-pyPACKAGE
- https://github.com/advisories/GHSA-8rq8-f485-7v8xADVISORY
Frequently Asked Questions
- What is CVE-2022-35411?
- rpc.py vulnerable to Deserialization of Untrusted Data This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
- How do I check if my project is affected by CVE-2022-35411?
- CVE-2022-35411 affects rpc-py. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2022-35411 and 200,000+ other known vulnerabilities.
Severity & Exploitability
CVSS Score
9.8
Exploitation is straightforward and causes maximum impact. Patch immediately.
Also Known As
PYSEC-2026-526
GHSA-8rq8-f485-7v8x
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