CVE-2026-33752: curl_cffi is the a Python binding for curl

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HIGH 8.6REMOTEUPGRADE

CVE-2026-33752 is a high-severity flaw (CVSS 8.6) affecting curl cffi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

curl_cffi is the a Python binding for curl. Prior to 0.15.0, curl_cffi does not restrict requests to internal IP ranges, and follows redirects automatically via the underlying libcurl. Because of this, an attacker-controlled URL can redirect requests to internal services such as cloud metadata endpoints. In addition, curl_cffi’s TLS impersonation feature can make these requests appear as legitimate browser traffic, which may bypass certain networ

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	8.6 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-918
Published	2026-04-06
Last modified	2026-10-26

Publisher (CNA): GitHub, Inc. · Vendor: lexiforest

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-06 16:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

lexiforest curl cffi UPGRADE

Affected: < 0.15.0 · 0.15.0 beta1 · 0.15.0 beta2 · 0.15.0 beta3 · 0.15.0 beta4

Fixed in: 0.15.0

Safe to downgrade to: no unaffected older release

1. Check installed version

pip show curl-cffi

2. UPGRADE to 0.15.0

pip install --upgrade "curl-cffi>=0.15.0"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33752?

curl cffi: upgrade to 0.15.0. Exact commands for each OS are on this page.

Is CVE-2026-33752 being exploited?

CVE-2026-33752 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33752 affect?

CVE-2026-33752 affects curl cffi. Severity is high (CVSS 8.6). curl_cffi is the a Python binding for curl. Prior to 0.15.0, curl_cffi does not restrict requests to internal IP ranges, and follows redirects automatically via the underlying libcurl. Because of this, an attacker-controlled URL can redirec

How urgent is CVE-2026-33752?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Python vulnerabilities · curl vulnerabilities

References

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