CVE-2025-61677
DataChain: Deserialization of Untrusted Data from Environment Variables
DataChain is a Python-based AI-data warehouse for transforming and analyzing unstructured data. Versions 0.34.1 and below allow for deseriaization of untrusted data because of the way the DataChain library reads serialized objects from environment variables (such as DATACHAIN__METASTORE and DATACHAIN__WAREHOUSE) in the loader.py module. An attacker with the ability to set these environment variables can trigger code execution when the application loads. This issue is fixed in version 0.34.2.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used
DataChain: Deserialization of Untrusted Data from Environment Variables
DataChain is a Python-based AI-data warehouse for transforming and analyzing unstructured data. Versions 0.34.1 and below allow for deseriaization of untrusted data because of the way the DataChain library reads serialized objects from environment variables (such as DATACHAIN__METASTORE and DATACHAIN__WAREHOUSE) in the loader.py module. An attacker with the ability to set these environment variables can trigger code execution when the application loads. This issue is fixed in version 0.34.2.
- Record
CVE-2025-61677- CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
EUVDEUVD-2025-32652
DataChain is a Python-based AI-data warehouse for transforming and analyzing unstructured data. Versions 0.34.1 and below allow for deseriaization of untrusted data because of the way the DataChain library reads serialized objects from environment variables (such as DATACHAIN__METASTORE and DATACHAIN__WAREHOUSE) in the loader.py module. An attacker with the ability to set these environment variables can trigger code execution when the application loads. This issue is fixed in version 0.34.2.
- Record
EUVD-2025-32652- CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-6px8-mr29-cj4r
DataChain Vulnerable to Deserialization of Untrusted Data from Environment Variables
The DataChain library reads serialized objects from environment variables (such as DATACHAIN__METASTORE and DATACHAIN__WAREHOUSE) in the loader.py module. An attacker with the ability to set these environment variables can trigger code execution when the application loads.
- Record
GHSA-6px8-mr29-cj4r- CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
NVD
DataChain is a Python-based AI-data warehouse for transforming and analyzing unstructured data. Versions 0.34.1 and below allow for deseriaization of untrusted data because of the way the DataChain library reads serialized objects from environment variables (such as DATACHAIN__METASTORE and DATACHAIN__WAREHOUSE) in the loader.py module. An attacker with the ability to set these environment variables can trigger code execution when the application loads. This issue is fixed in version 0.34.2.
- Record
CVE-2025-61677- CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
OSV
DataChain: Deserialization of Untrusted Data from Environment Variables
DataChain is a Python-based AI-data warehouse for transforming and analyzing unstructured data. Versions 0.34.1 and below allow for deseriaization of untrusted data because of the way the DataChain library reads serialized objects from environment variables (such as DATACHAIN__METASTORE and DATACHAIN__WAREHOUSE) in the loader.py module. An attacker with the ability to set these environment variables can trigger code execution when the application loads. This issue is fixed in version 0.34.2.
- Record
CVE-2025-61677- CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
OSVGHSA-6px8-mr29-cj4r
DataChain Vulnerable to Deserialization of Untrusted Data from Environment Variables
The DataChain library reads serialized objects from environment variables (such as DATACHAIN__METASTORE and DATACHAIN__WAREHOUSE) in the loader.py module. An attacker with the ability to set these environment variables can trigger code execution when the application loads.
- Record
GHSA-6px8-mr29-cj4r- CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Weakness
- CWE-502
- Updated
- 2026-11-02
OSVPYSEC-2026-1288
DataChain Vulnerable to Deserialization of Untrusted Data from Environment Variables
The DataChain library reads serialized objects from environment variables (such as DATACHAIN__METASTORE and DATACHAIN__WAREHOUSE) in the loader.py module. An attacker with the ability to set these environment variables can trigger code execution when the application loads.
- Record
PYSEC-2026-1288- CVSS 3.1
- 2.5 Low
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
datachainPyPI |
before 0.34.2 | 0.34.2 |
datachainPyPI |
before 0.34.2, plus listed versions 0.1.100.1.110.1.120.1.130.10.0 Show 45 moreShow less0.11.00.11.110.12.00.13.00.13.10.14.00.14.10.14.20.14.30.14.40.14.50.15.00.16.00.16.10.16.20.16.30.16.40.16.50.17.00.17.10.17.20.18.00.18.10.18.100.18.110.18.20.18.30.18.40.18.50.18.60.18.70.18.80.18.90.190.19.10.19.20.19.30.2.00.2.10.2.100.2.110.2.120.2.130.2.140.2.15 |
0.34.2 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2025-61677 is a low vulnerability (CVSS 2.5) in Iterative Datachain, published October 2, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 5th percentile. Fixed in datachain 0.34.2.
References
github.com/iterative/datachain/security/advisories/GHSA-6px8-mr29-cj4r
nvd.nist.gov/vuln/detail/CVE-2025-61677
pypi.org/project/datachain
Left out here: 126 versions. The JSON record has them.