CVE-2026-104721

mediumpriority · track · 0EPSS 0.003 · 26 %ileFR
grimoire priorityP3 · Track
Exploitable?
—
no known exploitation
Likely / severe?
0.33% (26th) EPSS
CVSS 6.3 · medium
Is it mine?
0 products
Check your exposure
Who says so?
1 sources
certfr

EPSS · scored 2026-10-27

Path-traversal vulnerability in QOS.CH Sarl Logback-classic on Java (logback-classic module) allows path-traversal vulnerability. More specifically, an MDC-based discriminator value flows unsanitized into a nested FileAppender path, letting an attacker who influences that MDC value (e.g. via an HTTP header) create and append log files outside the intended directory. This issue affects Logback-classic: from 0.9.14 through 1.6.4.  This vulnerability is similar to CVE-2026-19880 but involves other attack techniques.

01

cvss

Technical severity, 0–10. One row per scoring source.

6.3
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 1.7–6.3

v4.06.3mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:N/R:X/V:X/RE:M/U:Greensecondary · vulnerability@ncsc.ch
v4.01.7lowCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:N/R:X/V:X/RE:M/U:Greensecondary · CVSS-BT (t0sche)
02

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22US
03

affected products

Products and version ranges known to be affected.

No affected products recorded.

04

advisories (2)

Vendor and ecosystem advisories describing this.

05

sources

Which sources assert this record, and when.

certfrNVDCVE.orgMITRE
published 2026-10-02modified 2026-10-02
06

references (1) nvd

External citations — patches, advisories, analysis.

scry

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