CVE-2026-77756
CVE-2026-77756: 3 tracked advisory records across Apache, NetApp, Red Hat. Compare vendor sources and published fix guidance.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Apache
1 advisory- Advisory severityLow3.7
Low [CVE-2026-77756] Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat caused by processing the transfer-encoding header for an HTTP/1.0 request may allow an attacker to cause one request from another user to fail when Tomcat is located behind a reverse proxy
CVE-2026-77756Source published Source updated
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') vulnerability in Apache Tomcat caused by processing the transfer-encoding header for an HTTP/1.0 request may allow an attacker to cause one request from another user to fail when Tomcat is located behind a reverse proxy. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.25, from 10.1.0-M1 through 10.1.59, from 9.0.47 through 9.0.121. The following versions were EOL at the time the CVE was created but are known to be affected: from 8.5.67 through 8.5.100. Other unsupported versions may also be affected. Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
- Affected products in this advisory
- Apache Tomcat
- Source-reported affected versions
- 11.0.0-M1 through 11.0.25
- 10.1.0-M1 through 10.1.59
- 9.0.47 through 9.0.121.
- 8.5.67 through 8.5.100.
2 more entries in the full advisory.
- Source-reported fixed versions
- 11.0.26
- 10.1.60
- 9.0.122
- Mitigation guidance
- Users are recommended to upgrade to version 11.0.26, 10.1.60 or 9.0.122, which fix the issue.
NetApp
1 advisory- Advisory severityLow3.7
Low [CVE-2026-77756] Apache Tomcat Vulnerability in NetApp Products
NTAP-20261002-0012Source published Source updated
Apache Tomcat versions 9.0.47 through 9.0.121, 10.1.0-M1 through 10.1.59, and 11.0.0-M1 through 11.0.25 are susceptible to a vulnerability which when successfully exploited could lead to Denial of Service (DoS). Successful exploitation of this vulnerability could lead to Denial of Service (DoS). NetApp reports that one or more additional products remain under investigation; review the canonical advisory for current status. NetApp states there is no workaround available at this time.
- Affected products in this advisory
- No product details extracted. Check the source bulletin.
- Source-reported affected versions
- 9.0.47
- 9.0.121
- 10.1.0
- 10.1.59
2 more entries in the full advisory.
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
Red Hat
1 advisory- Advisory severityMedium5.3
Medium [CVE-2026-77756] Request smuggling vulnerability can lead to denial of service
CVE-2026-77756Source published Source updated
Request smuggling vulnerability can lead to denial of service. Red Hat rates this low (CVSS 5.3). Weakness: CWE-444. Red Hat lists fixing advisory RHSA-2026:68257 with package tomcat11-main-11.0.26-0.1.hum1, tomcat10-main-10.1.60-0.1.hum1. Affected products named by the advisory: Red Hat Hardened Images; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; and 8 more.
- Related products — impact not confirmed
- Red Hat Hardened Images
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
8 more entries in the full advisory.
- Source-reported affected versions
- 11.0.0
- 11.0.25
- 10.1.0
- 10.1.59
4 more entries in the full advisory.
- Source-reported fixed versions
- tomcat11-main-11.0.26-0.1.hum1
- tomcat10-main-10.1.60-0.1.hum1
- RHSA-2026:68257
- Mitigation guidance
- No mitigation guidance extracted; consult the source.
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