CVE-2026-34477 apache log4j
| Affected software | apache log4j |
|---|---|
| Severity | 6.3 Medium CVSS 4.0 2 scores |
| Fixed in | 2.25.4 |
| Weakness | CWE-297 |
| Published | 10 Apr 2026 |
| Updated | 26 Oct 2026 |
Description
The fix for CVE-2025-68161 https://logging.apache.org/security.html#CVE-2025-68161 was incomplete: it addressed hostname verification only when enabled via the log4j2.sslVerifyHostName https://logging.apache.org/log4j/2.x/manual/systemproperties.html#log4j2.sslVerifyHostName system property, but not when configured through the verifyHostName https://logging.apache.org/log4j/2.x/manual/appenders/network.html#SslConfiguration-attr-verifyHostName attribute of the <Ssl> element. Although the verifyHostName configuration attribute was introduced in Log4j Core 2.12.0, it was silently ignored in all versions through 2.25.3, leaving TLS connections vulnerable to interception regardless of the configured value. A network-based attacker may be able to perform a man-in-the-middle attack when all of the following conditions are met: * An SMTP, Socket, or Syslog appender is in use. * TLS is configured via a nested <Ssl> element. * The attacker can present a certificate issued by a CA trusted by the appender's configured trust store, or by the default Java trust store if none is configured. This issue does not affect users of the HTTP appender, which uses a separate verifyHostname https://logging.apache.org/log4j/2.x/manual/appenders/network.html#HttpAppender-attr-verifyHostName attribute that was not subject to this bug and verifies host names by default. Users are advised to upgrade to Apache Log4j Core 2.25.4, which corrects this issue.
CWE-295
Exploitation status
No public exploit
No exploit has been reported in the sources we check.
Exploitation status
- CISA KEV not listed
- VulnCheck KEV not listed
- CISA Vulnrichment exploitation: none
- Indexed PoC none indexed
- EPSS 0.57% chance in 30 days
Waratek protection
Within Waratek scope. In the sources we check, nobody has published exploit code for this CVE or reported it being exploited.
A public code fix exists: apache/logging-log4j2 #4075.
- Protection none
- Action unverified
- Review automated Upstream data
- Record active
| Decided by | Exploit code for this candidate, published in a reviewed catalogue or a GitHub repository with 5 or more stars, or in use per CISA or VulnCheck; not only a CISA verdict, a forecast, or nothing at all |
|---|---|
| Finding | This CVE is not listed in CISA KEV or VulnCheck KEV, CISA Vulnrichment records no active exploitation, no reviewed exploit catalogue carries an entry for it, and no GitHub PoC repository for it has 5 or more stars. Nobody has published exploit code worth tracing, so it is not a candidate for a rule ahead of the ones where somebody has; an upstream fix path does exist, so the remediation half of the candidacy still holds. This is a statement about what has been published, not about whether the defect is reachable or serious. |
| Candidate fix | https://github.com/apache/logging-log4j2/pull/4075 : a pull request: the change under review |
CVSS
6.3 MEDIUM
v4.0 CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/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:X/AU:X/R:X/V:X/RE:X/U:X
2 metrics
CVSS
6.3 MEDIUM v4.0CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/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:X/AU:X/R:X/V:X/RE:X/U:X
2 metrics
We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.
| Version | Score | Band | Vector | Assigner | Type | |
|---|---|---|---|---|---|---|
| CVSS 4.0 | 6.3 | MEDIUM | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:L/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:X/AU:X/R:X/V:X/RE:X/U:X |
security@apache.org | Secondary | published |
| CVSS 3.1 | 5.9 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N |
NVD | Primary |
Affected software and releases
Oracle advisories
| Advisory | Type | Quarter | Products Oracle names in its risk matrix |
|---|---|---|---|
| Oracle Critical Patch Update October 2026 ↗ | CPU | 2026-Q4 | Oracle Fusion Middleware / WebCenter Sites (Apache Log4j) (12.2.1.4.0) |
| Oracle Critical Patch Update July 2026 ↗ | CPU | 2026-Q3 | Oracle Communications / Alarms, KPI, and Measurements (Apache Log4j) (25.2.200) Oracle Communications / CMP (Apache Log4j) (15.0.0.0) Oracle Communications / Configuration (Apache Log4j) (25.2.201) Oracle Communications / Core (Apache Log4j) (6.1.1-7.0.0) Oracle Communications / Core (Apache Tomcat) (6.1.1-7.0.0) Oracle Communications / Install (Apache Log4j) (24.2.5) Oracle Communications / Install (Apache Log4j) (25.2.200) Oracle Communications / Management (Apache Log4j) (10.5.0.1.0, 10.5.0.2.0) Oracle Communications / NM Core (Apache Log4j) (15.0.0.0.0-15.2.0.0.0) Oracle Communications / Patch Request (Apache Log4j) (8.0.0.7.0-8.3.0.3.0) Oracle Communications / Platform (Apache Log4j) (15.0.0.0.0, 15.0.1.0.0, 15.1.0.0.0, 15.2.0.0.0) Oracle Communications / SEPP (Apache Log4j) (25.1.203, 25.2.200) Oracle Communications / Security (Apache Log4j) (25.2.0.0.0) Oracle Communications / Security (Apache Log4j) (8.0.0, 7.5.0, 7.4.1) Oracle Communications / Security (Apache Log4j) (8.1.0.0) Oracle Communications / Security Component (Apache Log4j) (7.5.0, 7.5.1, 7.6.0, 7.7.0, 7.8.0, 8.0.1) Oracle Communications / Security issues (Apache Log4j) (15.0.0.0.0, 15.0.1.0.0, 15.1.0.0.0, 15.2.0.0.0) Oracle Communications / Signaling (Apache Log4j) (25.1.200, 25.2.100, 25.2.200) Oracle Communications / XMPP Server (Apache Log4j) (10.0.1.8.0) Oracle Construction and Engineering / Admin (Apache Log4j) (21.12-21.12.17) Oracle Construction and Engineering / Platform (Apache Log4j) (21.12.0-21.12.17, 22.12.0-22.12.15, 23.12.0-23.12.16, 24.12.0-24.12.14, 25.12.0-25.12.6) Oracle Financial Services Applications / Installer (Apache Log4j) (8.1.2.7) Oracle Financial Services Applications / Platform (Apache Log4j) (8.0.7.9.0, 8.0.8.7.0, 8.1.2.5.0) Oracle Financial Services Applications / Reports (Apache Log4j) (8.1.2.9) Oracle Fusion Middleware / Centralized Thirdparty Jars (Apache Log4j) (12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 15.1.1.0.0) Oracle Fusion Middleware / Installer (Apache Log4j) (12.2.1.4.0, 14.1.2.1.0) Oracle Fusion Middleware / MFT Runtime Server (Apache Log4j) (12.2.1.4.0, 14.1.2.0.0) Oracle Fusion Middleware / Runtime Engine (Apache Log4j) (12.2.1.4.0, 14.1.2.0.0) Oracle Fusion Middleware / Third Party (Apache Log4j) (14.1.2.0.0) Oracle Fusion Middleware / Third Party Analysis Tool (Apache Log4j) (12.2.1.4.0) Oracle GoldenGate / Security (Apache Log4j) (26.1.0.0.0) Oracle HealthCare Applications / FHIR Server (Apache Log4j) (8.2.0.0-8.2.0.7) Oracle HealthCare Applications / Health Policy Engine (Apache Log4j) (4.0.0-4.0.2) Oracle HealthCare Applications / Master Index Data Manager (Apache Log4j) (5.0.0.0-5.0.9.6) Oracle Retail Applications / BDI Job Scheduler (Apache Log4j) (16.0.3, 19.0.1) Oracle Retail Applications / EBS Integration (Apache Log4j) (16.0.3, 19.0.1) Oracle Retail Applications / Installation (Apache Log4j) (21.0.0-25.0.0) Oracle Retail Applications / Mathematical Operators (Apache Log4j) (13.2.8) Oracle Retail Applications / PeopleSoft Integration (Apache Log4j) (16.0.3, 19.0.1) Oracle Retail Applications / Point of Sale (Apache Log4j) (21.0.5-25.0.1) Oracle Retail Applications / RIB Kernal (Apache Log4j) (16.0.3, 19.0.1) Oracle Retail Applications / RSB Installation (Apache Log4j) (16.0.3, 19.0.1) Oracle Retail Applications / Security (Apache Log4j) (16.0.3) Oracle Spatial Studio / Install issues (Apache Log4j) (23.2.1, 24.2) Oracle Supply Chain / Installation Issues (Apache Log4j) (3.6.1) Oracle Utilities Applications / Security (Apache Log4j) (4.3.0.6.0, 4.4.0.0.0, 4.4.0.2.0-4.4.0.4.0, 4.5.0.0.0, 4.5.0.1.1, 4.5.0.1.3, 4.5.0.2.0, 25.4, 25.10, 26.4) Oracle Utilities Applications / Tools (Apache Log4j) (7.0.0.0.8, 7.0.0.1.7, 25.4.0.0.3) |
| Oracle Critical Security Patch Update August 2026 ↗ | CSPU | 2026-Q3 | Oracle Enterprise Manager / EM Plugin: General (Apache Log4j) (13.5.1.0.0-13.5.6.0.0) Oracle Financial Services Applications / ECM (Apache Log4j) (8.0.8.2, 8.1.2.11) Oracle Financial Services Applications / Third Party (Apache Log4j) (8.0.8.1, 8.1.2.11) Oracle Financial Services Applications / User Interface (Apache Log4j) (8.0.8.0) Oracle Hyperion / Installation/Configuration (Apache Log4j) (11.2.25.0.000) Oracle Retail Applications / Application Core (Apache Log4j) (15.0, 16.0) Oracle Retail Applications / NF Issuing (Apache Log4j) (14.2) Oracle Retail Applications / Operations & Maintenance (Apache Log4j) (15.0, 16.0) Oracle Supply Chain / CAX Client (Apache Log4j) (3.6) |
| Oracle Critical Security Patch Update September 2026 ↗ | CSPU | 2026-Q3 | Oracle Communications / Access Service Request (Apache Log4j) (70.0.0) |
| Oracle Critical Security Patch Update June 2026 ↗ | CSPU | 2026-Q2 | Oracle Communications / Other (Apache Log4j) (7.3.6, 7.4.0, 7.5.0, 8.0.0) Oracle Enterprise Manager / Agent Next Gen (Apache Log4j) (13.5, 24.1) |
Oracle components and versions
| Family | Component | Versions, as Oracle lists them | Read as |
|---|---|---|---|
| Oracle Communications | Access Service Request (Apache Log4j) | 70.0.0 | 70.0.0 |
| Oracle Communications | Alarms, KPI, and Measurements (Apache Log4j) | 25.2.200 | 25.2.200 |
| Oracle Communications | CMP (Apache Log4j) | 15.0.0.0 | 15.0.0.0 |
| Oracle Communications | Configuration (Apache Log4j) | 25.2.201 | 25.2.201 |
| Oracle Communications | Core (Apache Log4j) | 6.1.1-7.0.0 | |
| Oracle Communications | Core (Apache Tomcat) | 6.1.1-7.0.0 | |
| Oracle Communications | Install (Apache Log4j) | 24.2.5 | 24.2.5 · 25.2.200 |
| Oracle Communications | Management (Apache Log4j) | 10.5.0.1.0, 10.5.0.2.0 | 10.5.0.1.0 · 10.5.0.2.0 |
| Oracle Communications | NM Core (Apache Log4j) | 15.0.0.0.0-15.2.0.0.0 | |
| Oracle Communications | Other (Apache Log4j) | 7.3.6, 7.4.0, 7.5.0, 8.0.0 | 7.3.6 · 7.4.0 · 7.5.0 · 8.0.0 |
| Oracle Communications | Patch Request (Apache Log4j) | 8.0.0.7.0-8.3.0.3.0 | |
| Oracle Communications | Platform (Apache Log4j) | 15.0.0.0.0, 15.0.1.0.0, 15.1.0.0.0, 15.2.0.0.0 | 15.0.0.0.0 · 15.0.1.0.0 · 15.1.0.0.0 · 15.2.0.0.0 |
| Oracle Communications | SEPP (Apache Log4j) | 25.1.203, 25.2.200 | 25.1.203 · 25.2.200 |
| Oracle Communications | Security (Apache Log4j) | 8.0.0, 7.5.0, 7.4.1 | 7.4.1 · 7.5.0 · 8.0.0 · 8.1.0.0 · 25.2.0.0.0 |
| Oracle Communications | Security Component (Apache Log4j) | 7.5.0, 7.5.1, 7.6.0, 7.7.0, 7.8.0, 8.0.1 | 7.5.0 · 7.5.1 · 7.6.0 · 7.7.0 · 7.8.0 · 8.0.1 |
| Oracle Communications | Security issues (Apache Log4j) | 15.0.0.0.0, 15.0.1.0.0, 15.1.0.0.0, 15.2.0.0.0 | 15.0.0.0.0 · 15.0.1.0.0 · 15.1.0.0.0 · 15.2.0.0.0 |
| Oracle Communications | Signaling (Apache Log4j) | 25.1.200, 25.2.100, 25.2.200 | 25.1.200 · 25.2.100 · 25.2.200 |
| Oracle Communications | XMPP Server (Apache Log4j) | 10.0.1.8.0 | 10.0.1.8.0 |
| Oracle Construction and Engineering | Admin (Apache Log4j) | 21.12-21.12.17 | |
| Oracle Construction and Engineering | Platform (Apache Log4j) | 21.12.0-21.12.17, 22.12.0-22.12.15, 23.12.0-23.12.16, 24.12.0-24.12.14, 25.12.0-25.12.6 | |
| Oracle Enterprise Manager | Agent Next Gen (Apache Log4j) | 13.5, 24.1 | 13.5 · 24.1 |
| Oracle Enterprise Manager | EM Plugin: General (Apache Log4j) | 13.5.1.0.0-13.5.6.0.0 | |
| Oracle Financial Services Applications | ECM (Apache Log4j) | 8.0.8.2, 8.1.2.11 | 8.0.8.2 · 8.1.2.11 |
| Oracle Financial Services Applications | Installer (Apache Log4j) | 8.1.2.7 | 8.1.2.7 |
| Oracle Financial Services Applications | Platform (Apache Log4j) | 8.0.7.9.0, 8.0.8.7.0, 8.1.2.5.0 | 8.0.7.9.0 · 8.0.8.7.0 · 8.1.2.5.0 |
| Oracle Financial Services Applications | Reports (Apache Log4j) | 8.1.2.9 | 8.1.2.9 |
| Oracle Financial Services Applications | Third Party (Apache Log4j) | 8.0.8.1, 8.1.2.11 | 8.0.8.1 · 8.1.2.11 |
| Oracle Financial Services Applications | User Interface (Apache Log4j) | 8.0.8.0 | 8.0.8.0 |
| Oracle Fusion Middleware | Centralized Thirdparty Jars (Apache Log4j) | 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0, 15.1.1.0.0 | 12.2.1.4.0 · 14.1.1.0.0 · 14.1.2.0.0 · 15.1.1.0.0 |
| Oracle Fusion Middleware | Installer (Apache Log4j) | 12.2.1.4.0, 14.1.2.1.0 | 12.2.1.4.0 · 14.1.2.1.0 |
| Oracle Fusion Middleware | MFT Runtime Server (Apache Log4j) | 12.2.1.4.0, 14.1.2.0.0 | 12.2.1.4.0 · 14.1.2.0.0 |
| Oracle Fusion Middleware | Runtime Engine (Apache Log4j) | 12.2.1.4.0, 14.1.2.0.0 | 12.2.1.4.0 · 14.1.2.0.0 |
| Oracle Fusion Middleware | Third Party (Apache Log4j) | 14.1.2.0.0 | 14.1.2.0.0 |
| Oracle Fusion Middleware | Third Party Analysis Tool (Apache Log4j) | 12.2.1.4.0 | 12.2.1.4.0 |
| Oracle Fusion Middleware | WebCenter Sites (Apache Log4j) | 12.2.1.4.0 | 12.2.1.4.0 |
| Oracle GoldenGate | Security (Apache Log4j) | 26.1.0.0.0 | 26.1.0.0.0 |
| Oracle HealthCare Applications | FHIR Server (Apache Log4j) | 8.2.0.0-8.2.0.7 | |
| Oracle HealthCare Applications | Health Policy Engine (Apache Log4j) | 4.0.0-4.0.2 | |
| Oracle HealthCare Applications | Master Index Data Manager (Apache Log4j) | 5.0.0.0-5.0.9.6 | |
| Oracle Hyperion | Installation/Configuration (Apache Log4j) | 11.2.25.0.000 | 11.2.25.0.0 |
| Oracle Retail Applications | Application Core (Apache Log4j) | 15.0, 16.0 | 15.0 · 16.0 |
| Oracle Retail Applications | BDI Job Scheduler (Apache Log4j) | 16.0.3, 19.0.1 | 16.0.3 · 19.0.1 |
| Oracle Retail Applications | EBS Integration (Apache Log4j) | 16.0.3, 19.0.1 | 16.0.3 · 19.0.1 |
| Oracle Retail Applications | Installation (Apache Log4j) | 21.0.0-25.0.0 | |
| Oracle Retail Applications | Mathematical Operators (Apache Log4j) | 13.2.8 | 13.2.8 |
| Oracle Retail Applications | NF Issuing (Apache Log4j) | 14.2 | 14.2 |
| Oracle Retail Applications | Operations & Maintenance (Apache Log4j) | 15.0, 16.0 | 15.0 · 16.0 |
| Oracle Retail Applications | PeopleSoft Integration (Apache Log4j) | 16.0.3, 19.0.1 | 16.0.3 · 19.0.1 |
| Oracle Retail Applications | Point of Sale (Apache Log4j) | 21.0.5-25.0.1 | |
| Oracle Retail Applications | RIB Kernal (Apache Log4j) | 16.0.3, 19.0.1 | 16.0.3 · 19.0.1 |
| Oracle Retail Applications | RSB Installation (Apache Log4j) | 16.0.3, 19.0.1 | 16.0.3 · 19.0.1 |
| Oracle Retail Applications | Security (Apache Log4j) | 16.0.3 | 16.0.3 |
| Oracle Spatial Studio | Install issues (Apache Log4j) | 23.2.1, 24.2 | 23.2.1 · 24.2 |
| Oracle Supply Chain | CAX Client (Apache Log4j) | 3.6 | 3.6 |
| Oracle Supply Chain | Installation Issues (Apache Log4j) | 3.6.1 | 3.6.1 |
| Oracle Utilities Applications | Security (Apache Log4j) | 4.3.0.6.0, 4.4.0.0.0, 4.4.0.2.0-4.4.0.4.0, 4.5.0.0.0, 4.5.0.1.1, 4.5.0.1.3, 4.5.0.2.0, 25.4, 25.10, 26.4 | 4.3.0.6.0 · 4.4.0.0.0 · 4.5.0.0.0 · 4.5.0.1.1 · 4.5.0.1.3 · 4.5.0.2.0 · 25.4 · 25.10 · 26.4 |
| Oracle Utilities Applications | Tools (Apache Log4j) | 7.0.0.0.8, 7.0.0.1.7, 25.4.0.0.3 | 7.0.0.0.8 · 7.0.0.1.7 · 25.4.0.0.3 |
Maven packages
Affected and fixed versions, from OSV.dev| Package | Introduced | Fixed | Last affected |
|---|---|---|---|
org.apache.logging.log4j:log4j-core |
2.12.0 | 2.25.4 |
unbounded |
org.apache.logging.log4j:log4j-core |
3.0.0-alpha1 | none | 3.0.0-beta3 |
Products and versions
2 products, 9 version entries| Source | Vendor | Product | Scheme | Affected versions |
|---|---|---|---|---|
| nvd | apache | log4j | generic | ≥ 2.12.0 and ＜ 2.25.4 · 3.0.0:alpha1 · 3.0.0:alpha1_rc1 · 3.0.0:alpha1_rc2 · 3.0.0:beta1 · 3.0.0:beta2 · 3.0.0:beta3 |
| osv | org.apache.logging.log4j | log4j-core | generic | ≥ 2.12.0 and ＜ 2.25.4 · ≥ 3.0.0 and ≤ 3.0.0 |
References
Timeline
Timeline
| Published | 2026-04-10 | By the CVE Program. |
|---|---|---|
| NVD record modified | 2026-10-26 | NVD's own last-modified date for this record. |