CVE-2026-33266: Use of Hard-coded Cryptographic Key vulnerability in Apache OpenMeetings. The remember-me cookie encryption k

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HIGH 7.5REMOTEWATCHLISTUPGRADE

CVE-2026-33266 is a high-severity flaw (CVSS 7.5) affecting openmeetings. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use of Hard-coded Cryptographic Key vulnerability in Apache OpenMeetings. The remember-me cookie encryption key is set to default value in openmeetings.properties and not being auto-rotated. In case OM admin hasn't changed the default encryption key, an attacker who has stolen a cookie from a logged-in user can get full user credentials. This issue affects Apache OpenMeetings: from 6.1.0 before 9.0.0. Users are recommended to upgrade to versi

Why this priority

High severity
Remotely exploitable, no login, no user action
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-321
Published	2026-04-09
Last modified	2026-10-26

Publisher (CNA): Apache Software Foundation · Vendor: apache

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

Am I affected?

Timeline

2026-04-09 16:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

apache openmeetings UPGRADE

Affected: >= 6.1.0 and < 9.0.0

Fixed in: 9.0.0

Safe to downgrade to: a release before 6.1.0

1. Check installed version

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

2. UPGRADE to 9.0.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade openmeetings

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 6.1.0 (Debian / Ubuntu)

apt-cache madison openmeetings sudo apt install openmeetings=<VERSION_BEFORE_6.1.0> sudo apt-mark hold openmeetings

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

dnf --showduplicates list openmeetings sudo dnf downgrade openmeetings-<VERSION_BEFORE_6.1.0> sudo dnf versionlock add openmeetings

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-2026-33266?

openmeetings: upgrade to 9.0.0. Exact commands for each OS are on this page.

Is CVE-2026-33266 being exploited?

CVE-2026-33266 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-2026-33266 affect?

CVE-2026-33266 affects openmeetings. Severity is high (CVSS 7.5). Use of Hard-coded Cryptographic Key vulnerability in Apache OpenMeetings. The remember-me cookie encryption key is set to default value in openmeetings.properties and not being auto-rotated. In case OM admin hasn't changed the default encr

How urgent is CVE-2026-33266?

Priority 42/100. High severity; Remotely exploitable, no login, no user action; On your watchlist

Related CVEs

CVE-2026-34020 HIGH 7.5 UPGRADE Use of GET Request Method With Sensitive Query Strings vulnerability in Apache OpenMeetings. The REST login e
CVE-2026-33005 MEDIUM 4.3 UPGRADE Improper Handling of Insufficient Privileges vulnerability in Apache OpenMeetings. Any registered user can qu
CVE-2026-49488 MEDIUM 6.5 UPGRADE Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Apache OpenMee

References

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