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TI-2021-09146 Aliases CVE-2021-27737GHSA-j9pm-x686-vcvp

Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.

Priority LOW 39Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Apache Traffic Server 9.0.0 is vulnerable to a remote DOS attack on the experimental Slicer plugin.

Why it matters now

EPSS 0.03694 89th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Apache Traffic ServerApache Traffic Server 9.0.0—No fix listedCNA
  • Apache Traffic Server Vendor— Affected Apache Traffic Server 9.0.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:apache:traffic_server:9.0.0:-:*:*:*:*:*:*9.0.0VulnerableApache
  • cpe:2.3:a:apache:traffic_server:9.0.0:-:*:*:*:*:*:* Versions 9.0.0 Vulnerable ·Apache

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-27737
  2. 2026-10-03 Alias added: GHSA-j9pm-x686-vcvp

References

Advisory 1

Other 2

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2024-20685 Apache Traffic Server: HTTP/2 CONTINUATION frames can be utilized for DoS attack CVSS 3.1HIGH 7.5
  • TI-2019-06950 Some HTTP/2 implementations are vulnerable to a settings flood, potentially leading to a… CVSS 3.1HIGH 7.5
  • TI-2019-06949 Some HTTP/2 implementations are vulnerable to a reset flood, potentially leading to a… CVSS 3.1HIGH 7.5
  • TI-2019-06947 Some HTTP/2 implementations are vulnerable to ping floods, potentially leading to a… CVSS 3.1HIGH 7.5
  • TI-2023-20588 Apache Traffic Server: Malformed http/2 frames can cause an abort CVSS 3.1HIGH 7.5
See all 120 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences