How severe is CVE-2026-33752?

CVE-2026-33752 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-33752 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-33752?

CVE-2026-33752 primarily affects Lexiforest Curl Cffi. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-33752?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-33752 have an EU (EUVD) identifier?

Yes. CVE-2026-33752 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19293.

When was CVE-2026-33752 published?

CVE-2026-33752 was published on 2026-04-06 and last updated on 2026-06-17.

CVE-2026-33752

CVE-2026-33752 is a high-severity vulnerability in Lexiforest Curl Cffi with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: High (CVSS 3.x base score 8.6)
EPSS exploit prediction: 0% (37th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19293
Weakness: CWE-918
Affected product: Lexiforest Curl Cffi
Published: 2026-04-06
Last modified: 2026-06-17

Description

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 network controls. This vulnerability is fixed in 0.15.0.

Frequently asked questions

What is CVE-2026-33752?: 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 network controls. This vulnerability is fixed in 0.15.0.
How severe is CVE-2026-33752?: CVE-2026-33752 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-33752 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (37th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-33752?: CVE-2026-33752 primarily affects Lexiforest Curl Cffi. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-33752?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-33752 have an EU (EUVD) identifier?: Yes. CVE-2026-33752 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19293.
When was CVE-2026-33752 published?: CVE-2026-33752 was published on 2026-04-06 and last updated on 2026-06-17.

References

https://github.com/lexiforest/curl_cffi/security/advisories/GHSA-qw2m-4pqf-rmpp

Affected products (5)

cpe:2.3:a:lexiforest:curl_cffi:*:*:*:*:*:python:*:*
cpe:2.3:a:lexiforest:curl_cffi:0.15.0:beta1:*:*:*:python:*:*
cpe:2.3:a:lexiforest:curl_cffi:0.15.0:beta2:*:*:*:python:*:*
cpe:2.3:a:lexiforest:curl_cffi:0.15.0:beta3:*:*:*:python:*:*
cpe:2.3:a:lexiforest:curl_cffi:0.15.0:beta4:*:*:*:python:*:*

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