CVE-2026-5766: An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. ASGI requests with a missing or understated

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-5766 is a medium-severity flaw (CVSS 5.3) affecting django. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. ASGI requests with a missing or understated `Content-Length` header can bypass the `FILE_UPLOAD_MAX_MEMORY_SIZE` limit, potentially loading large files into memory and causing service degradation. As a reminder, Django expects a limit to be configured at the web server level rather than solely relying on `FILE_UPLOAD_MAX_MEMORY_SIZE`. Earlier, unsupported Django series (such a

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-130
Published	2026-05-05
Last modified	2026-10-26

Publisher (CNA): Django Software Foundation · Vendor: djangoproject

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

Am I affected?

Timeline

2026-05-05 16:16 UTCPublished CVE record published
2026-10-26 19:10 UTCUpdated Record last modified

djangoproject django UPGRADE

Affected: >= 5.2 and < 5.2.14 · >= 6.0 and < 6.0.5

Fixed in: 5.2.14, 6.0.5

Safe to downgrade to: a release before 5.2

1. Check installed version

apt-cache policy django || rpm -q django || django --version

2. UPGRADE to 5.2.14 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade django

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade django

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 5.2 (Debian / Ubuntu)

apt-cache madison django sudo apt install django=<VERSION_BEFORE_5.2> sudo apt-mark hold django

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list django sudo dnf downgrade django-<VERSION_BEFORE_5.2> sudo dnf versionlock add django

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-5766?

django: upgrade to 5.2.14, 6.0.5. Exact commands for each OS are on this page.

Is CVE-2026-5766 being exploited?

CVE-2026-5766 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-2026-5766 affect?

CVE-2026-5766 affects django. Severity is medium (CVSS 5.3). An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. ASGI requests with a missing or understated `Content-Length` header can bypass the `FILE_UPLOAD_MAX_MEMORY_SIZE` limit, potentially loading large files into memory and causi

How urgent is CVE-2026-5766?

Priority 33/100. Remotely exploitable, no login, no user action

Software pages

Django vulnerabilities

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References

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