CVE-2026-49844
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2026-49844 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation even though it is not (yet) in the CISA KEV catalog.
A remote, anonymous attacker can exploit multiple vulnerabilities in Apache log4j and Apache Log4cxx to manipulate files.
CSIRTS triage
- What
- Multiple vulnerabilities allow a remote, anonymous attacker to manipulate files.
- Who is affected
- Deployments of Apache log4j and Log4cxx that are vulnerable.
- Urgency
- Remediation is medium urgency due to the potential for file manipulation by anonymous attackers.
- Action
- Apply the latest patches for Apache log4j and Log4cxx.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Low exploitation risk0.57% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 45% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2026-49844 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
Advisory coverage (3)
- medium[NEW] [medium] Apache log4j and Log4cxx: Multiple vulnerabilities allow file manipulationcert-bund · 2026-08-13
- mediumGHSA-qv9r-c865-cp47: Apache Log4j API: Improper encoding of non-finite floating-point values during MapMessage…ghsa · 2026-07-11
- mediumCVE-2026-49844: Improper encoding of non-finite floating-point values during MapMessage JSON serialization in …nvd · 2026-07-10
External references
Embed the live status
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[](https://www.csirts.com/cve/CVE-2026-49844)