CVE-2025-45769: php-jwt v6.11.0 was discovered to contain weak encryption

Q: How do I fix CVE-2025-45769?

firebase php-jwt: upgrade to newer than 6.11.0. Exact commands for each OS are on this page.

Q: Is CVE-2025-45769 being exploited?

CVE-2025-45769 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-2025-45769 affect?

CVE-2025-45769 affects firebase php-jwt. Severity is medium (CVSS 6.5). php-jwt v6.11.0 was discovered to contain weak encryption. NOTE: this issue has been disputed on the basis that key lengths are expected to be set by an application, not by this library. This dispute is subject to review under CNA rules 4.1

Q: How urgent is CVE-2025-45769?

Priority 29/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 6.5REMOTEUPGRADE

CVE-2025-45769 is a medium-severity flaw (CVSS 6.5) affecting firebase php-jwt. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

php-jwt v6.11.0 was discovered to contain weak encryption. NOTE: this issue has been disputed on the basis that key lengths are expected to be set by an application, not by this library. This dispute is subject to review under CNA rules 4.1.4, 4.1.14, and other rules; the dispute tagging is not meant to recommend an outcome for this CVE Record.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.1% (top 96%)
CISA exploited list	No
Weakness	CWE-326
Published	2025-07-31
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: google

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-07-31 20:15 UTCPublished CVE record published
2026-06-17 09:25 UTCUpdated Record last modified

google firebase php-jwt UPGRADE

Affected: <= 6.11.0

Fixed in: newer than 6.11.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy firebase-php-jwt || rpm -q firebase-php-jwt || firebase-php-jwt --version

2. UPGRADE to newer than 6.11.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade firebase-php-jwt

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade firebase-php-jwt

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-2025-45769?

firebase php-jwt: upgrade to newer than 6.11.0. Exact commands for each OS are on this page.

Is CVE-2025-45769 being exploited?

CVE-2025-45769 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-2025-45769 affect?

CVE-2025-45769 affects firebase php-jwt. Severity is medium (CVSS 6.5). php-jwt v6.11.0 was discovered to contain weak encryption. NOTE: this issue has been disputed on the basis that key lengths are expected to be set by an application, not by this library. This dispute is subject to review under CNA rules 4.1

How urgent is CVE-2025-45769?

Priority 29/100. Remotely exploitable, no login, no user action

Software pages

PHP vulnerabilities

References

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