CVE catalog
CVE-2021-45046
apache-log4j2: CVE-2021-45046
- Severity
- Critical · CVSS 9
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- Exploitation
- CISA Known Exploited Vulnerabilities
- EPSS
- 99.98% · Oct 25, 2026
Apache Log4j2 contains a deserialization of untrusted data vulnerability due to the incomplete fix of CVE-2021-44228, where the Thread Context Lookup Pattern is vulnerable to remote code execution in certain non-default configurations.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | apache-log4j2 | sid | 2.26.1-1 | fixed |
| Debian | apache-log4j2 | forky | 2.19.0-2 | fixed |
| Debian | apache-log4j2 | trixie | 2.19.0-2 | fixed |
| Debian | apache-log4j2 | bookworm | 2.19.0-2 | fixed |
| Maven | org.apache.logging.log4j:log4j-core | Not reported | 2.3.1 | fixed |
| Maven | org.ops4j.pax.logging:pax-logging-log4j2 | Not reported | 2.0.12 | fixed |
| Maven | org.ops4j.pax.logging:pax-logging-log4j2 | Not reported | 1.10.8 | fixed |
| Maven | org.ops4j.pax.logging:pax-logging-log4j2 | Not reported | 1.11.11 | fixed |
| Maven | org.apache.logging.log4j:log4j-core | Not reported | 2.12.2 | fixed |
| Ubuntu | apache-log4j2 | 20.04 | 2.11.1-2 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.11.2-1 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.15.0-0.20.04.1 | vulnerable |
| Ubuntu | apache-log4j2 | 20.04 | 2.16.0-0.20.04.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | apache-log4j2 | source | sid | 2.16.0-1 | not yet assigned | Not reported | [1001729] |
| Debian | apache-log4j2 | source | forky | 2.16.0-1 | not yet assigned | Not reported | [1001729] |
| Debian | apache-log4j2 | source | trixie | 2.16.0-1 | not yet assigned | Not reported | [1001729] |
| Debian | apache-log4j2 | source | bookworm | 2.16.0-1 | not yet assigned | Not reported | [1001729] |
| Maven | org.apache.logging.log4j:log4j-core | maven | Not reported | 2.3.1 | Not reported | GHSA-7RJR-3Q55-VV33 | Not reported |
| Maven | org.ops4j.pax.logging:pax-logging-log4j2 | maven | Not reported | 2.0.12 | Not reported | GHSA-7RJR-3Q55-VV33 | Not reported |
| Maven | org.ops4j.pax.logging:pax-logging-log4j2 | maven | Not reported | 1.10.8 | Not reported | GHSA-7RJR-3Q55-VV33 | Not reported |
| Maven | org.ops4j.pax.logging:pax-logging-log4j2 | maven | Not reported | 1.11.11 | Not reported | GHSA-7RJR-3Q55-VV33 | Not reported |
| Maven | org.apache.logging.log4j:log4j-core | maven | Not reported | 2.12.2 | Not reported | GHSA-7RJR-3Q55-VV33 | Not reported |
| Ubuntu | apache-log4j2 | deb | 20.04 | 2.16.0-0.20.04.1 | Not reported | UBUNTU-CVE-2021-45046 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [liblog4j2-java]Fixed
Source package: [apache-log4j2]
Details (2)
2.19.0-2· all · bookwormFixed · Fixed:
2.16.0-1dsa · apache-log4j2 · debian · bookworm; dsa · apache-log4j2 · debian · 12
2.19.0-2· all · bookwormFixed · Fixed:
2.16.0-1dsa · apache-log4j2 · debian · bookworm; dsa · apache-log4j2 · debian · 12
[Debian 13 (Trixie)]
- [liblog4j2-java]Fixed
Source package: [apache-log4j2]
Details (2)
2.19.0-2· all · trixieFixed · Fixed:
2.16.0-1dsa · apache-log4j2 · debian · 13
2.19.0-2· all · trixieFixed · Fixed:
2.16.0-1dsa · apache-log4j2 · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2021_1601-1.json]
- [https://github.com/advisories/GHSA-7rjr-3q55-vv33]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-45046]
- [https://osv.dev/vulnerability/DSA-5022-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-45046]
- [https://security-tracker.debian.org/tracker/CVE-2021-45046]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-45046.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1203.json]
- [https://www.cisa.gov/known-exploited-vulnerabilities-catalog]
[CERT-Bund public advisories] · [CISA Known Exploited Vulnerabilities (OSINT)] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]