CVE-2026-35404: Open edX Platform enables the authoring and delivery of online learning at any scale

Q: How do I fix CVE-2026-35404?

openedx: upgrade to newer than 2026-04-02. Exact commands for each OS are on this page.

Q: Is CVE-2026-35404 being exploited?

CVE-2026-35404 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-35404 affect?

CVE-2026-35404 affects openedx. Severity is medium (CVSS 4.7). Open edX Platform enables the authoring and delivery of online learning at any scale. The view_survey endpoint accepts a redirect_url GET parameter that is passed directly to HttpResponseRedirect() without any URL validation. When a non-exi

Q: How urgent is CVE-2026-35404?

Priority 25/100. Public exploit reference

Routine

MEDIUM 4.7UPGRADE

CVE-2026-35404 is a medium-severity flaw (CVSS 4.7) affecting openedx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Open edX Platform enables the authoring and delivery of online learning at any scale. The view_survey endpoint accepts a redirect_url GET parameter that is passed directly to HttpResponseRedirect() without any URL validation. When a non-existent survey name is provided, the server issues an immediate HTTP 302 redirect to the attacker-controlled URL. Additionally, the same unvalidated URL is embedded in a hidden form field and returned in a JSON r

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	4.7 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-601
Published	2026-04-06
Last modified	2026-07-24

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

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-06 22:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

openedx openedx UPGRADE

Affected: <= 2026-04-02

Fixed in: newer than 2026-04-02

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 2026-04-02 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openedx

Note

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

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-2026-35404?

openedx: upgrade to newer than 2026-04-02. Exact commands for each OS are on this page.

Is CVE-2026-35404 being exploited?

CVE-2026-35404 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-2026-35404 affect?

CVE-2026-35404 affects openedx. Severity is medium (CVSS 4.7). Open edX Platform enables the authoring and delivery of online learning at any scale. The view_survey endpoint accepts a redirect_url GET parameter that is passed directly to HttpResponseRedirect() without any URL validation. When a non-exi

How urgent is CVE-2026-35404?

Priority 25/100. Public exploit reference

Related CVEs

CVE-2026-42858 HIGH 8.5 UPGRADE Open edX Platform enables the authoring and delivery of online learning at any scale
CVE-2026-42857 MEDIUM 4.6 UPGRADE Open edX Platform enables the authoring and delivery of online learning at any scale

References

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