CVE-2026-123356
GROBID: Unauthenticated `/api/modelTraining` Endpoint Allows Unbounded Thread Pool Creation (DoS)
GROBID is machine learning software for extracting information from scholarly documents. Prior to 0.9.1, the unauthenticated /api/modelTraining endpoint calls GrobidRestProcessTraining.trainModel in GrobidRestProcessTraining.java, where each request creates Executors.newFixedThreadPool(1), submits a training task, and leaves the executor running. Repeated requests permanently retain JVM worker threads and can exhaust process or operating-system thread capacity, degrading or stopping request processing. This issue is fixed in version 0.9.1.
Fixes and workarounds
Fix
kermitt2/grobid (other): GitHub reports patched versions 0.9.1. Check the advisory for the affected release branch.
Source: GitHub GHSA-g2r5-4c8r-c84fAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| grobid grobidOrg |
< 0.9.1 (affected) | CNA: GitHub_M |
kermitt2/grobidkermitt2/grobid
other |
0.9.0 (affected, GitHub advisory range) | GitHub GHSA-g2r5-4c8r-c84f |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: GitHub_M |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/grobidOrg/grobid/security/advisories/GHSA-g2r5-4c8r-c84fCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/grobidOrg/grobid/pull/1477CNA: GitHub_M · x_refsource_MISC
- https://github.com/grobidOrg/grobid/commit/3227e9a6a990ec1687173045f119c24e17d10103CNA: GitHub_M · x_refsource_MISC
- https://github.com/grobidOrg/grobid/releases/tag/0.9.1CNA: GitHub_M · x_refsource_MISC
- https://github.com/grobidOrg/grobid/commit/3227e9a6a990ec1687173045f119c24e17d10103[email protected]
- https://github.com/grobidOrg/grobid/pull/1477[email protected]
- https://github.com/grobidOrg/grobid/releases/tag/0.9.1[email protected]
- https://github.com/grobidOrg/grobid/security/advisories/GHSA-g2r5-4c8r-c84f[email protected]
- https://github.com/grobidOrg/grobid/security/advisories/GHSA-g2r5-4c8r-c84fGitHub Security Advisories · advisory
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