CVE-2026-78631: The Okta Hyperdrive Agent writes the decoded SAML bearer assertion to a local application log file at the defa

Routine

MEDIUM 5.3UPGRADE

CVE-2026-78631 is a medium-severity flaw (CVSS 5.3) affecting hyperdrive. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Okta Hyperdrive Agent writes the decoded SAML bearer assertion to a local application log file at the default log level on every successful MFA completion. This insertion of sensitive information into the log file makes a live authentication credential readable by any local user with access to the log file.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 97%)
CISA exploited list	No
Weakness	CWE-532
Published	2026-09-08
Last modified	2026-09-22

Publisher (CNA): Okta · Vendor: okta

Last updated 2026-09-22 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-08 21:18 UTCPublished CVE record published
2026-09-22 20:02 UTCUpdated Record last modified

okta hyperdrive UPGRADE

Affected: >= 1.4.0 and < 1.5.2

Fixed in: 1.5.2

Safe to downgrade to: a release before 1.4.0

1. Check installed version

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

2. UPGRADE to 1.5.2 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade hyperdrive

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 1.4.0 (Debian / Ubuntu)

apt-cache madison hyperdrive sudo apt install hyperdrive=<VERSION_BEFORE_1.4.0> sudo apt-mark hold hyperdrive

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

dnf --showduplicates list hyperdrive sudo dnf downgrade hyperdrive-<VERSION_BEFORE_1.4.0> sudo dnf versionlock add hyperdrive

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-2026-78631?

hyperdrive: upgrade to 1.5.2. Exact commands for each OS are on this page.

Is CVE-2026-78631 being exploited?

CVE-2026-78631 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-2026-78631 affect?

CVE-2026-78631 affects hyperdrive. Severity is medium (CVSS 5.3). The Okta Hyperdrive Agent writes the decoded SAML bearer assertion to a local application log file at the default log level on every successful MFA completion. This insertion of sensitive information into the log file makes a live authentic

How urgent is CVE-2026-78631?

Priority 19/100. No elevated risk signals yet.

Software pages

Okta vulnerabilities

Related CVEs

CVE-2026-78574 HIGH 7.5 UPGRADE The Okta Hyperdrive Integration plugin resolves a required assembly using a registry path within the current u
CVE-2026-78627 HIGH 7.3 UPGRADE The Okta Hyperdrive Integration installer does not mask the OAuth client secret when passed as an MSI property
CVE-2026-78629 MEDIUM 5.6 UPGRADE The Okta Hyperdrive agent plugin returns a success response without a signed SAML assertion when the organizat

References

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