Vulnerability-Lookup

OESA-2026-2978 (CVE-2026-58055)

Vulnerability from osv_openeuler – Published: 2026-07-09 11:11 – Updated: 2026-08-06 11:11 – Source website

Summary

nghttp2 security update

Details

The framing layer of HTTP/2 is implemented as a form of reusable C library. On top of that, we have implemented HTTP/2 client, server and proxy. We have also developed load test and benchmarking tool for HTTP/2.

Security Fix(es):

nghttp2's nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content-Length header and body onto reusable keep-alive backend connections, re-adding the Upgrade and Connection headers while passing Content-Length verbatim. A backend that resolves the resulting ambiguous message in the attacker's favor enables HTTP request/response smuggling and cross-client response-queue poisoning.(CVE-2026-58055)

Severity

5.4 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2026-58055	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "libnghttp2-1.46.0-8.oe2203sp4.aarch64.rpm",
          "libnghttp2-devel-1.46.0-8.oe2203sp4.aarch64.rpm",
          "nghttp2-1.46.0-8.oe2203sp4.aarch64.rpm",
          "nghttp2-debuginfo-1.46.0-8.oe2203sp4.aarch64.rpm",
          "nghttp2-debugsource-1.46.0-8.oe2203sp4.aarch64.rpm"
        ],
        "noarch": [
          "nghttp2-help-1.46.0-8.oe2203sp4.noarch.rpm"
        ],
        "src": [
          "nghttp2-1.46.0-8.oe2203sp4.src.rpm"
        ],
        "x86_64": [
          "libnghttp2-1.46.0-8.oe2203sp4.x86_64.rpm",
          "libnghttp2-devel-1.46.0-8.oe2203sp4.x86_64.rpm",
          "nghttp2-1.46.0-8.oe2203sp4.x86_64.rpm",
          "nghttp2-debuginfo-1.46.0-8.oe2203sp4.x86_64.rpm",
          "nghttp2-debugsource-1.46.0-8.oe2203sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:22.03-LTS-SP4",
        "name": "nghttp2",
        "purl": "pkg:rpm/openEuler/nghttp2\u0026distro=openEuler-22.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.46.0-8.oe2203sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "The framing layer of HTTP/2 is implemented as a form of reusable C library. On top of that, we have implemented HTTP/2 client, server and proxy. We have also developed load test and benchmarking tool for HTTP/2.\r\n\r\nSecurity Fix(es):\n\nnghttp2\u0026apos;s nghttpx proxy through 1.69.0 forwards an HTTP/1.1 Upgrade request that also carries a Content-Length header and body onto reusable keep-alive backend connections, re-adding the Upgrade and Connection headers while passing Content-Length verbatim. A backend that resolves the resulting ambiguous message in the attacker\u0026apos;s favor enables HTTP request/response smuggling and cross-client response-queue poisoning.(CVE-2026-58055)",
  "id": "OESA-2026-2978",
  "modified": "2026-08-06T11:11:52Z",
  "published": "2026-07-09T11:11:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2978"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-58055"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "nghttp2 security update",
  "upstream": [
    "CVE-2026-58055"
  ]
}

CVE-2026-58055 (GCVE-0-2026-58055)

Vulnerability from cvelistv5 – Published: 2026-06-28 01:32 – Updated: 2026-06-29 13:51

Title

nghttp2 nghttpx - HTTP Request/Response Smuggling via Upgrade Request with Content-Length

Summary

Severity

5.4 (Medium)


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

6.3 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-29 13:51 UTC

CWE

CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://github.com/bikini/exploitarium/tree/main/…	exploitthird-party-advisory
https://github.com/nghttp2/nghttp2/commit/ab28105…	patch
https://www.vulncheck.com/advisories/nghttp2-nght…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
nghttp2	nghttp2	Affected: 0 , ≤ 1.69.0 (semver) cpe:2.3:a:nghttp2:nghttp2::::::::

Date Public

2026-06-26 00:00

Credits

ashdfrkl

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-58055",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-06-29T13:51:50.981193Z",
                "version": "2.0.3"
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          "dateUpdated": "2026-06-29T13:51:59.891Z",
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            }
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                  "criteria": "cpe:2.3:a:nghttp2:nghttp2:*:*:*:*:*:*:*:*",
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              "operator": "OR"
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            "vulnIntegrityImpact": "LOW"
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      "problemTypes": [
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      "providerMetadata": {
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          "url": "https://github.com/bikini/exploitarium/tree/main/nghttp2-nghttpx-upgrade-queue-poison-poc"
        },
        {
          "name": "Fix commit (master)",
          "tags": [
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          "url": "https://github.com/nghttp2/nghttp2/commit/ab28105c4a0197da24f8bfc414bc116055249e1e"
        },
        {
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          "url": "https://www.vulncheck.com/advisories/nghttp2-nghttpx-http-request-response-smuggling-via-upgrade-request-with-content-length"
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    "dateReserved": "2026-06-28T00:55:25.426Z",
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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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

OESA-2026-2978 (CVE-2026-58055)

CVE-2026-58055 (GCVE-0-2026-58055)

Tags

Sightings

Nomenclature

Related by attack behaviour