Is CVE-2026-33033 in the CISA KEV catalog?

No. CVE-2026-33033 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-33033?

CVE-2026-33033 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2026-33033?

CVE-2026-33033 has an EPSS score of 0.69% (48th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-33033?

Upgrade python-django on debian unstable to 3:4.2.30-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2026-33033

MEDIUM

6.5

CVSS v3

NVD

Description

An issue was discovered in 6.0 before 6.0.4, 5.2 before 5.2.13, and 4.2 before 4.2.30. `MultiPartParser` allows remote attackers to degrade performance by submitting multipart uploads with `Content-Transfer-Encoding: base64` including excessive whitespace. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected. Django would like to thank Seokchan Yoon for reporting this issue.

CWE-407

How to fix

Remediation Available

python-djangoDebian

Fixed in:3:4.2.30-1CVE-2026-33033

python-djangoUbuntu

Fixed in:1.6.11-0ubuntu1.3+esm11USN-8154-2

Fixed in:1.8.7-1ubuntu5.15+esm12USN-8154-2

Fixed in:1:1.11.11-1ubuntu1.21+esm15USN-8154-1

Fixed in:2:2.2.12-1ubuntu0.29+esm8USN-8154-1

Fixed in:2:3.2.12-2ubuntu1.26USN-8154-1

Fixed in:3:4.2.11-1ubuntu1.15USN-8154-1

Fixed in:3:5.2.4-1ubuntu2.4USN-8154-1

python3-djangoUbuntu

Fixed in:1.8.7-1ubuntu5.15+esm12USN-8154-2

Fixed in:1:1.11.11-1ubuntu1.21+esm15USN-8154-1

Fixed in:2:2.2.12-1ubuntu0.29+esm8USN-8154-1

Fixed in:2:3.2.12-2ubuntu1.26USN-8154-1

Fixed in:3:4.2.11-1ubuntu1.15USN-8154-1

Fixed in:3:5.2.4-1ubuntu2.4USN-8154-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

0.69%probability of exploitation in 30 days

48thpercentile

Moderate risk: more likely to be exploited than 48% of all known CVEs.

References

Patch2

Release Notes1

groups.google.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-13.