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Vulnerabilities

Vulnerability · CVE-2008-0128

The SingleSignOn Valve (org.apache.catalina.authenticator.SingleSignOn) in Apache Tomcat before 5.5.21 does not set the secure flag for the JSESSIONIDSSO cookie in an…

Published Jan 23, 2008 · catalog updated Jun 16, 2026 · the affected product

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2008-0128 is not in CISA KEV. FIRST estimates a 19.62% chance of exploitation in the next 30 days. Check whether you run the affected product.

Gaps on this record

  • No plain product name is stored. The page cannot tell you which product to check.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.0
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
19.62%
Remediation
Version ranges on file
Affected products
cpe apache/tomcat

The SingleSignOn Valve (org.apache.catalina.authenticator.SingleSignOn) in Apache Tomcat before 5.5.21 does not set the secure flag for the JSESSIONIDSSO cookie in an https session, which can cause the cookie to be sent in http requests and make it easier for remote attackers to capture this cookie.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/tomcat<= 5.5.20

How to fix CVE-2008-0128

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2008-0128 is not in CISA KEV. FIRST estimates a 19.62% chance of exploitation in the next 30 days. Check whether you run the affected product.

Which versions are affected?

Compare what you have installed with <= 5.5.20. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-16: Configuration. EPSS 19.62%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Apache Tomcat security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 23, 2008 · Monitored products — critical

    Detected

    The SingleSignOn Valve (org.apache.catalina.authenticator.SingleSignOn) in Apache Tomcat before 5.5.21 does not set the secure flag for the JSESSIONIDSSO cookie in an https session, which can cause the cookie to be sent in http requests and make it easier for remote attackers to capture this cookie.

  2. Jun 16, 2026 · Monitored products — critical

    Updated

    The SingleSignOn Valve (org.apache.catalina.authenticator.SingleSignOn) in Apache Tomcat before 5.5.21 does not set the secure flag for the JSESSIONIDSSO cookie in an https session, which can cause the cookie to be sent in http requests and make it easier for remote attackers to capture this cookie.

Sources

  • FIRST EPSSExploitation probabilityCVE-2008-0128

    30-day exploitation probability 19.62%

    first.org
  • Monitored products — criticalVendor advisoryCVE-2008-0128

    The SingleSignOn Valve (org.apache.catalina.authenticator.SingleSignOn) in Apache Tomcat before 5.5.21 does not set the secure flag for the JSESSIONIDSSO cookie in an https session, which can cause the cookie to be sent in http requests and make it easier for remote attackers to capture this cookie.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSNov 3, 2026
  • Monitored products — criticalNov 3, 2026