CVE-2026-103119Apache Tomcat: AJP response mix-up
Updated under an hour ago ()
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It affects Apache Software Foundation Apache Tomcat. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Buffer under-read vulnerability in Apache Tomcat meant that a large non-blocking write could result in the response body being split between the current request and the next request received on that connection leading most likely to failure of the second request and possibly leakage of data from the first response to the second. This issue affects Apache Tomcat: from 11.0.0-M25 through 11.0.26. Users are recommended to upgrade to version 11.0.27, which fixes the issue.
- CVSS
- 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- Weakness (CWE)
- CWE-127
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- apache
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 20, 2026
- First seen by InfoSec Signals
- Oct 20, 2026
Affected products
Apache Software Foundation Apache Tomcat apache_software_foundation:apache_tomcat (from the name) | from 11.0.0-M25 through 11.0.26 | CNA record |
References
- https://lists.apache.org/thread.html/sk2cg4k077fwcqbm6tqz2n700nq06h80vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/10/20/28
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.