How severe is CVE-2026-13707?

CVE-2026-13707 has a CVSS 4.0 base score of 0.0, rated none severity.

Is CVE-2026-13707 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-13707?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-13707 published?

CVE-2026-13707 was published on 2026-07-01.

CVE-2026-13707

CVE-2026-13707 is a none-severity vulnerability with a CVSS 4.0 base score of 0.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-384.

Key facts

Severity: None (CVSS 4.0 base score 0.0)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Published: 2026-07-01
Last modified: 2026-07-01

Description

Session fixation vulnerability in Wikimedia Foundation OAuth. This vulnerability is associated with program files src/Backend/MWOAuthServer.Php. This issue affects OAuth: from * through 1.46.0, 1.45.4, 1.44.6, 1.43.9.

Frequently asked questions

What is CVE-2026-13707?: Session fixation vulnerability in Wikimedia Foundation OAuth. This vulnerability is associated with program files src/Backend/MWOAuthServer.Php. This issue affects OAuth: from * through 1.46.0, 1.45.4, 1.44.6, 1.43.9.
How severe is CVE-2026-13707?: CVE-2026-13707 has a CVSS 4.0 base score of 0.0, rated none severity.
Is CVE-2026-13707 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-13707?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-13707 published?: CVE-2026-13707 was published on 2026-07-01.

References

https://phabricator.wikimedia.org/T428324

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