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CVE-2026-58157 Apache CVE debrief

Apache Traffic Server can improperly reuse server sessions and tunnels, exposing data across client connections. This issue affects Apache Traffic Server versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The vulnerability allows for the improper reuse of server sessions and tunnels, potentially leading to data exposure across client connections. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue. Organizations should be aware of this vulnerability and take action to upgrade to a fixed version to prevent potential data exposure.

Vendor
Apache
Product
Traffic Server
CVSS
MEDIUM 6.9
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-29
Original CVE updated
2026-08-03
Advisory published
2026-07-29
Advisory updated
2026-08-03

Who should care

Organizations using Apache Traffic Server versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3 should be aware of this vulnerability and take action to upgrade to a fixed version to prevent potential data exposure. This includes operators, platform administrators, vulnerability management teams, and security teams responsible for ensuring the security and integrity of their systems and data.

Technical summary

The vulnerability in Apache Traffic Server allows for the improper reuse of server sessions and tunnels, which can lead to data exposure across client connections. This issue affects multiple versions of Apache Traffic Server, specifically versions 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The recommended solution is to upgrade to version 9.2.15 or 10.1.4, which includes the fix for this issue. Affected organizations should review their deployments and consider compensating controls.

Defensive priority

Medium priority due to the potential for data exposure across client connections.

Recommended defensive actions

  • Upgrade to version 9.2.15 or 10.1.4
  • Review and update affected versions
  • Monitor for potential data exposure
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability affecting Apache Traffic Server. The issue allows for improper reuse of server sessions and tunnels, potentially exposing data across client connections. Affected versions include 8.0.0 through 8.1.9, 9.0.0 through 9.2.14, and 10.0.0 through 10.1.3. The recommended fix is to upgrade to version 9.2.15 or 10.1.4.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-29T10:16:41.173Z and has not been modified since then.