Vulnerability-Lookup

ubuntu-cve-2026-65100

Vulnerability from osv_ubuntu

Published

2026-07-30 00:00

Modified

2026-07-30 00:00

Summary

Details

Apache Traffic Server updates the HTTP/2 HPACK dynamic table before confirming the header block encoded successfully, so an encode failure leaves the encoder out of sync with the peer decoder and corrupts subsequent header blocks on the connection. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

Severity

4.8 (Medium)


                    
                      CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

6.3 (Medium)


                    
                      CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-65100	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-65100	REPORT
	https://lists.apache.org/thread/5prl9glcm9g2swnq9…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "trafficserver",
            "binary_version": "5.3.0-2ubuntu2"
          },
          {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "5.3.0-2ubuntu2"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:16.04:LTS",
        "name": "trafficserver",
        "purl": "pkg:deb/ubuntu/trafficserver@5.3.0-2ubuntu2?arch=source\u0026distro=xenial"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "5.3.0-2ubuntu1",
        "5.3.0-2ubuntu2"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "trafficserver",
            "binary_version": "7.1.2+ds-3"
          },
          {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "7.1.2+ds-3"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:18.04:LTS",
        "name": "trafficserver",
        "purl": "pkg:deb/ubuntu/trafficserver@7.1.2+ds-3?arch=source\u0026distro=bionic"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "7.0.0-5",
        "7.1.2+ds-2",
        "7.1.2+ds-2build1",
        "7.1.2+ds-3"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "trafficserver",
            "binary_version": "8.0.5+ds-3ubuntu0.1~esm1"
          },
          {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "8.0.5+ds-3ubuntu0.1~esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:20.04:LTS",
        "name": "trafficserver",
        "purl": "pkg:deb/ubuntu/trafficserver@8.0.5+ds-3ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.0.5+ds-1",
        "8.0.5+ds-2",
        "8.0.5+ds-2build1",
        "8.0.5+ds-2ubuntu1",
        "8.0.5+ds-3",
        "8.0.5+ds-3ubuntu0.1~esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "trafficserver",
            "binary_version": "9.1.1+ds-2ubuntu0.1+esm1"
          },
          {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "9.1.1+ds-2ubuntu0.1+esm1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:Pro:22.04:LTS",
        "name": "trafficserver",
        "purl": "pkg:deb/ubuntu/trafficserver@9.1.1+ds-2ubuntu0.1+esm1?arch=source\u0026distro=esm-apps/jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "8.1.1+ds-1.1",
        "9.1.1+ds-2build1",
        "9.1.1+ds-2ubuntu0.1~esm1",
        "9.1.1+ds-2ubuntu0.1",
        "9.1.1+ds-2ubuntu0.1+esm1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "trafficserver",
            "binary_version": "9.2.3+ds-1+deb12u1ubuntu0.1"
          },
          {
            "binary_name": "trafficserver-experimental-plugins",
            "binary_version": "9.2.3+ds-1+deb12u1ubuntu0.1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "trafficserver",
        "purl": "pkg:deb/ubuntu/trafficserver@9.2.3+ds-1+deb12u1ubuntu0.1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "9.2.1+ds-1build1",
        "9.2.2+ds-1",
        "9.2.3+ds-1",
        "9.2.3+ds-1+deb12u1",
        "9.2.3+ds-1+deb12u1build1",
        "9.2.3+ds-1+deb12u1build3",
        "9.2.3+ds-1+deb12u1build4",
        "9.2.3+ds-1+deb12u1ubuntu0.1"
      ]
    }
  ],
  "aliases": [],
  "details": "Apache Traffic Server updates the HTTP/2 HPACK dynamic table before confirming the header block encoded successfully, so an encode failure leaves the encoder out of sync with the peer decoder and corrupts subsequent header blocks on the connection. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.9, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.",
  "id": "UBUNTU-CVE-2026-65100",
  "modified": "2026-07-30T00:00:00Z",
  "published": "2026-07-30T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-65100"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-65100"
    },
    {
      "type": "REPORT",
      "url": "https://lists.apache.org/thread/5prl9glcm9g2swnq9hqxvnokylm1gr6d"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N",
      "type": "CVSS_V4"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-65100"
  ]
}

CVE-2026-65100 (GCVE-0-2026-65100)

Vulnerability from cvelistv5 – Published: 2026-07-29 09:06 – Updated: 2026-07-29 12:10

Title

Apache Traffic Server: HPACK encoder desynchronizes from the decoder after a failed header encode

Summary

Severity

4.8 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-696 - Incorrect Behavior Order

Assigner

apache

References

1 reference

URL	Tags
https://lists.apache.org/thread/5prl9glcm9g2swnq9…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Traffic Server	Affected: 8.0.0 , ≤ 8.1.9 (semver) Affected: 9.0.0 , ≤ 9.2.14 (semver) Affected: 10.0.0 , ≤ 10.1.3 (semver)

Credits

Omkhar Arasaratnam Apache Community

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-65100",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-07-29T12:10:15.907595Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-29T12:10:22.340Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Apache Traffic Server",
          "vendor": "Apache Software Foundation",
          "versions": [
            {
              "lessThanOrEqual": "8.1.9",
              "status": "affected",
              "version": "8.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.2.14",
              "status": "affected",
              "version": "9.0.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "10.1.3",
              "status": "affected",
              "version": "10.0.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
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          "lang": "en",
          "type": "reporter",
          "value": "Omkhar Arasaratnam"
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        }
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          "supportingMedia": [
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          ],
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      ],
      "metrics": [
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            "content": {
              "text": "moderate"
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            "attackComplexity": "HIGH",
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            "availabilityImpact": "LOW",
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            "confidentialityImpact": "NONE",
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            "valueDensity": "NOT_DEFINED",
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    "dateReserved": "2026-07-21T17:10:18.202Z",
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}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

ubuntu-cve-2026-65100

Vulnerability from osv_ubuntu

CVE-2026-65100 (GCVE-0-2026-65100)

Tags

Sightings

Nomenclature