2.1

CVE-2026-34086: wikimedia foundation abusefilter Improper Input Validation

CVSS: 2.1v4.0LowAwaiting analysis
AliasesUBUNTU-CVE-2026-34086DEBIAN-CVE-2026-34086
Published 11-05-2026Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2026-34086 is a low (CVSS 2.1) Improper Input Validation vulnerability in wikimedia foundation abusefilter. EPSS estimates a 0.32% chance of exploitation in the next 30 days, higher than 23% of scored vulnerabilities.

Overall risk
8/100
0100
Minimal · default modelHow is this calculated?
CVSS score
2.1/10
010
Low · v4.0 (CVE.org)
EPSS score
0.32%
0%100%
Low · +0.07 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 11-05-2026
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

Vulnerability in Wikimedia Foundation AbuseFilter. This issue affects AbuseFilter: from * before 1.43.7, 1.44.4, 1.45.2.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.32%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

+0.07 pp

From 0.24% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.32%

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

Debian1 product
  • mediawikiAll versions (No fix recorded) | < 1:1.43.8+dfsg-1~deb13u1 | < 1:1.43.8+dfsg-1
Ubuntu1 product
  • mediawikiAll versions (No fix recorded)
Wikimedia foundation1 product

3 vendors · 3 products

References

8 links