CVE-2026-34478
unknown
CVSS v3
—
CVSS v4 NEW
—
VIR risk
—
Description
Apache Log4j Core: log injection in `Rfc5424Layout` due to silent configuration incompatibility
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 0 |
| sid | Fixed | 0 |
| forky | Fixed | 0 |
| bullseye | Fixed | 0 |
| bookworm | Fixed | 0 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| Maven | org.apache.logging.log4j:log4j-core | >=2.21.0,<2.25.4 | 2.25.4 |
| Maven | org.apache.logging.log4j:log4j-core | >=3.0.0-beta1,<=3.0.0-beta3 | |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| gcp | | |
References
- https://security-tracker.debian.org/tracker/CVE-2026-34478
- https://nvd.nist.gov/vuln/detail/CVE-2026-34478
- https://github.com/apache/logging-log4j2/pull/4074
- https://github.com/apache/logging-log4j2
- https://lists.apache.org/thread/3k1clr2l6vkdnl4cbhjrnt1nyjvb5gwt
- https://logging.apache.org/cyclonedx/vdr.xml
- https://logging.apache.org/log4j/2.x/manual/layouts.html#RFC5424Layout
- https://logging.apache.org/security.html#CVE-2026-34478
- http://www.openwall.com/lists/oss-security/2026/04/10/7
- https://www.suse.com/security/cve/CVE-2026-34478.html
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.