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Unratedamended

curl_cffi bundles a version of libcurl affected by High Severity vulnerability

GHSA-3vpc-4p9p-47hc

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (curl-cffi 0.7.0b6), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • PyPI curl-cffi

    Affected
    <= 0.6.4
    Fixed in
    0.7.0b6

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
not scored
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Summary curlcffi is potentially affected by High Severity vulnerability (CVE-2023-38545) in libcurl<8.4.0 Details HIGH severity vulnerability in curl and libcurl: announcement Details are still unknown, but seems it will be a major issue as it's advertised by curl devs as "probably the worst curl security flaw in a long time". A patched version (8.4.0) and details will be published around 06:00 UTC on October 11. curlcffi wheels on PyPI ship with libcurl 7.84.0 PoC https://inspector.pypi.io/project/curl-cffi/0.5.10b2/packages/56/ae/eb7d39ad234f1f44650b910757d5aa696feff413d327c8328223ce78cb76/curlcffi-0.5.10b2-cp37-abi3-manylinux217aarch64.manylinux2014aarch64.whl/curlcffi/include/curl/curlver.h Resolution Versions after 0.7 bundles with libcurl=8.5, which is not affected by this issue.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-3vpc-4p9p-47hc

  2. Revision 1 · created ·

    Published from osv record GHSA-3vpc-4p9p-47hc

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-3vpc-4p9p-47hc

Advisory: curl_cffi bundles a version of libcurl affected by High Severity vulnerability
IDs: GHSA-3vpc-4p9p-47hc
Record: https://patchnext.com/advisories/ghsa-3vpc-4p9p-47hc (revision 2, source checked 26 Oct 2026, 13:22 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: curl-cffi 0.7.0b6. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI curl-cffi: affected <= 0.6.4; fixed in 0.7.0b6

## Suggested inspection (read-only)
- `python -m pip show curl-cffi`: 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 curl-cffi.
- 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-3vpc-4p9p-47hc (OSV record GHSA-3vpc-4p9p-47hc lists affected ranges: PyPI curl-cffi >=0 <0.7.0b6 (fixed))
- Verified: https://github.com/advisories/GHSA-3vpc-4p9p-47hc (GitHub-reviewed advisory GHSA-3vpc-4p9p-47hc lists affected ranges: PyPI curl-cffi >=0 <=0.6.4)

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