CVE-2026-41243: OpenLearn is open-source educational forum software

Q: How do I fix CVE-2026-41243?

openlearn: upgrade to 2026-04-14. Exact commands for each OS are on this page.

Q: Is CVE-2026-41243 being exploited?

CVE-2026-41243 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-2026-41243 affect?

CVE-2026-41243 affects openlearn. Severity is medium (CVSS 5.4). OpenLearn is open-source educational forum software. Prior to commit 844b2a40a69d0c4911580fe501923f0b391313ab, when `safeMode` is enabled, unapproved forum posts are hidden from the public list, but the direct post-read procedure still retu

Q: How urgent is CVE-2026-41243?

Priority 26/100. Public exploit reference

Routine

MEDIUM 5.4UPGRADE

CVE-2026-41243 is a medium-severity flaw (CVSS 5.4) affecting openlearn. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OpenLearn is open-source educational forum software. Prior to commit 844b2a40a69d0c4911580fe501923f0b391313ab, when `safeMode` is enabled, unapproved forum posts are hidden from the public list, but the direct post-read procedure still returns the full post to anyone with the post UUID. Commit 844b2a40a69d0c4911580fe501923f0b391313ab fixes the issue.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.4 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 93%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-04-23
Last modified	2026-10-26

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

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

Am I affected?

Timeline

2026-04-23 02:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

siemvk openlearn UPGRADE

Affected: < 2026-04-14

Fixed in: 2026-04-14

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 2026-04-14 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openlearn

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-2026-41243?

openlearn: upgrade to 2026-04-14. Exact commands for each OS are on this page.

Is CVE-2026-41243 being exploited?

CVE-2026-41243 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-2026-41243 affect?

CVE-2026-41243 affects openlearn. Severity is medium (CVSS 5.4). OpenLearn is open-source educational forum software. Prior to commit 844b2a40a69d0c4911580fe501923f0b391313ab, when `safeMode` is enabled, unapproved forum posts are hidden from the public list, but the direct post-read procedure still retu

How urgent is CVE-2026-41243?

Priority 26/100. Public exploit reference

References

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