7.6

CVE-2026-13707: mediawiki Session Fixation

CVSS: 7.6v3.1HighAnalyzed
Published 01-07-2026Last modified 01-07-2026
Open JSON

Vulnerability summary

CVE-2026-13707 is a high (CVSS 7.6) Session Fixation vulnerability in mediawiki. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 26.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.6/10
010
High · v3.1 (NVD)
EPSS score
0.34%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 01-07-2026
    PublishedVulnerability first disclosed.
  2. 01-07-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

27%

Versus all other CVEs

30-day change

0.00 pp

From 0.34% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.34%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Mediawiki1 product
  • mediawiki≥ 1.43.0, < 1.43.9 | ≥ 1.44.0, < 1.44.6 | ≥ 1.45.0, < 1.45.4 | 1.46.0:rc0
Wikimedia foundation1 product
  • oauth≤ 1.46.0, 1.45.4, 1.44.6, 1.43.9

2 vendors · 2 products

References

1 links