Apache Answer: Insertion of sensitive information into log file
Summary
Apache Answer through 2.0.2 writes full API keys to application logs on every authenticated request. Anyone who can read these logs can recover active bearer credentials and replay them. The attacker needs log-read access, and CISA SSVC rates exploitation as none.
Affected
- Apache Answer through 2.0.2
- Unknown: whether releases before 2.0.0 are affected.
- Conflict: Vulners lists the range as 2.0.0-RC2 to 2.0.3. Verify against the Apache advisory.
Fixed in
- Apache Answer 2.0.3
Workaround
- No vendor workaround is documented.
- Restrict read access to application logs, including container logs, log shipping and backups (analyst suggestion).
Exploitation
- No known exploitation in the wild. Not listed in KEV according to Strix.
- No public proof of concept found.
- EPSS about 0.003 (Vulners).
- Unknown: whether the upgrade revokes keys that were already logged.
Our recommendation
- Upgrade Apache Answer to 2.0.3 or later.
- Restrict access to all logs that may contain Answer output.
- Search existing logs for API key strings and rotate any keys found.
- Review API key usage for the period before the upgrade.
- Verify the affected range against the Apache advisory.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Apache list thread (vendor advisory) lists.apache.org
- oss-security post CVE-2026-64943 www.openwall.com
- OpenCVE CVE-2026-64943 app.opencve.io
- Strix CVE-2026-64943 www.strix.ai
- OffSeq Radar CVE-2026-64943 radar.offseq.com
- Vulners MEND CVE-2026-64943 vulners.com
- Vulners CNNVD-2026-63203942 vulners.com
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 1 Nov 2026, 18:44.
Original description (NVD)
Insertion of Sensitive Information into Log File vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. Full API keys are written to application logs on every authenticated request, allowing anyone with log-read access to recover and replay active bearer credentials. Users are recommended to upgrade to version 2.0.3, which fixes the issue.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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