llama-index-core vulnerable to Uncontrolled Resource Consumption

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

5.3 · CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS

• CVE-2025-6208: 0.41% estimated exploitation activity in the next 30 days; percentile 35.81 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

The SimpleDirectoryReader component in llamaindex.core version 0.12.23 suffers from uncontrolled memory consumption due to a resource management flaw. The vulnerability arises because the user-specified file limit (numfileslimit) is applied after all files in a directory are loaded into memory. This can lead to memory exhaustion and degraded performance, particularly in environments with limited resources. The issue is resolved in version 0.12.41.

Published by the source

2 Feb 2026, 12:31 UTC

Last modified by the source

7 Jul 2026, 17:56 UTC

Source last checked

26 Oct 2026, 13:36 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-488g-hw5f-x29p

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-488g-hw5f-x29p

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# Patch Next advisory brief: CVE-2025-6208

Advisory: llama-index-core vulnerable to Uncontrolled Resource Consumption
IDs: CVE-2025-6208, GHSA-488g-hw5f-x29p
Record: https://patchnext.com/advisories/cve-2025-6208 (revision 2, source checked 26 Oct 2026, 13:36 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: llama-index-core 0.12.41. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI llama-index-core: affected < 0.12.41; fixed in 0.12.41

## Suggested inspection (read-only)
- `python -m pip show llama-index-core`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on llama-index-core.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-488g-hw5f-x29p (OSV record GHSA-488g-hw5f-x29p lists affected ranges: PyPI llama-index-core >=0 <0.12.41 (fixed))
- Verified: https://github.com/advisories/GHSA-488g-hw5f-x29p (GitHub-reviewed advisory GHSA-488g-hw5f-x29p lists affected ranges: PyPI llama-index-core >=0 <0.12.41)

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