CVE-2025-62515 json
Remote Code Execution by Pickle Deserialization via FlightServer in pyquokka
published 2025-10-17 12 mo ago modified 2026-10-08 31 d ago also GHSA-f74j-gffq-vm9p , PYSEC-2026-503 , EUVD-2025-34900
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 59%
- public exploits
- 0
- none known
Summary
pyquokka is a framework for making data lakes work for time series. In versions 0.3.1 and prior, the FlightServer class directly uses pickle.loads() to deserialize action bodies received from Flight clients without any sanitization or validation in the do_action() method. The vulnerable code is located in pyquokka/flight.py at line 283 where arbitrary data from Flight clients is directly passed to pickle.loads(). When FlightServer is configured to listen on 0.0.0.0, this allows attackers across the entire network to perform arbitrary remote code execution by sending malicious pickled payloads through the set_configs action. Additional vulnerability points exist in the cache_garbage_collect, do_put, and do_get functions where pickle.loads is used to deserialize untrusted remote data.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 12 mo ago
Exploit prediction
0.89% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | pyquokka | <=0.3.1 |
no fix listed |
Affected products
- marsupialtail quokka
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
github.com
/marsupialtail/quokka/security/advisories/GHSA-f74j-gffq-vm9p
web
-
nvd.nist.gov
/vuln/detail/CVE-2025-62515
advisory
-
github.com
/marsupialtail/quokka
package
-
github.com
/marsupialtail/quokka/blob/master/pyquokka/flight.py#L283
web
-
pypi.org
/project/pyquokka
package
-
github.com
/advisories/GHSA-f74j-gffq-vm9p
advisory
Sources
- CVE List CVE-2025-62515
- GitHub Advisory GHSA-f74j-gffq-vm9p
- NVD CVE-2025-62515
- OSV PYSEC-2026-503
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