Vulnerability-Lookup

GHSA-WPWW-4QVV-XPV8

Vulnerability from github – Published: 2026-05-06 00:31 – Updated: 2026-05-06 18:30

Details

This issue affects Apache HTTP Server: through 2.4.66.

Users are recommended to upgrade to version 2.4.67, which fixes the issue.

Severity ?

9.8 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-28780"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-122"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-05T22:16:00Z",
    "severity": "CRITICAL"
  },
  "details": "Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server.\nIf mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker controlled bytes after the end of a heap based buffer.\n\nThis issue affects Apache HTTP Server: through 2.4.66.\n\nUsers are recommended to upgrade to version 2.4.67, which fixes the issue.",
  "id": "GHSA-wpww-4qvv-xpv8",
  "modified": "2026-05-06T18:30:30Z",
  "published": "2026-05-06T00:31:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28780"
    },
    {
      "type": "WEB",
      "url": "https://httpd.apache.org/security/vulnerabilities_24.html"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/05/9"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-28780 (GCVE-0-2026-28780)

Vulnerability from cvelistv5 – Published: 2026-05-05 21:29 – Updated: 2026-05-06 15:50

Title

Apache HTTP Server: buffer overflow in mod_proxy_ajp via ajp_msg_check_header()

Summary

Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server. If mod_proxy_ajp connects to a malicious AJP server this AJP server can send a malicious AJP message back to mod_proxy_ajp and cause it to write 4 attacker controlled bytes after the end of a heap based buffer. This issue affects Apache HTTP Server: through 2.4.66. Users are recommended to upgrade to version 2.4.67, which fixes the issue.

Severity ?

No CVSS data available.

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

apache

References

URL

Tags

https://httpd.apache.org/security/vulnerabilities…

vendor-advisory

Impacted products

	Vendor	Product	Version
	Apache Software Foundation	Apache HTTP Server	Affected: 0 , ≤ 2.4.66 (semver)

Credits

Andrew Lacambra Elhanan Haenel Tianshuo Han (<hantianshuo233@gmail.com>) Tristan Madani

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JSON

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  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2026-05-05T22:24:30.623Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/05/9"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 9.8,
              "baseSeverity": "CRITICAL",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
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            "other": {
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                "options": [
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                  },
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                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-06T15:49:38.049896Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-06T15:50:18.682Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
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          "vendor": "Apache Software Foundation",
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              "lessThanOrEqual": "2.4.66",
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              "versionType": "semver"
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      ],
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        },
        {
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          "type": "finder",
          "value": "Elhanan Haenel"
        },
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          "lang": "en",
          "type": "finder",
          "value": "Tianshuo Han (\u003chantianshuo233@gmail.com\u003e)"
        },
        {
          "lang": "en",
          "type": "finder",
          "value": "Tristan Madani"
        }
      ],
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      "metrics": [
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            "content": {
              "text": "low"
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            "type": "Textual description of severity"
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      "problemTypes": [
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          "descriptions": [
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      "source": {
        "discovery": "UNKNOWN"
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          "time": "2026-02-04T12:00:00.000Z",
          "value": "reported"
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          "time": "2026-03-18T12:00:00.000Z",
          "value": "reported by 3rd finder"
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          "lang": "en",
          "time": "2026-02-28T12:00:00.000Z",
          "value": "reported by 2nd finder"
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      ],
      "title": "Apache HTTP Server: buffer overflow in mod_proxy_ajp via  ajp_msg_check_header()",
      "x_generator": {
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  "cveMetadata": {
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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.

Action not permitted

GHSA-WPWW-4QVV-XPV8

CVE-2026-28780 (GCVE-0-2026-28780)

Tags

Sightings

Nomenclature