Vulnerability-Lookup

ALSA-2026:61376

Vulnerability from osv_almalinux – Published: 2026-08-31 00:00 – Updated: 2026-09-01 08:42 – Source website

Summary

Important: nodejs22 security update

Details

Node.js is a platform built on Chrome's JavaScript runtime \ for easily building fast, scalable network applications. \ Node.js uses an event-driven, non-blocking I/O model that \ makes it lightweight and efficient, perfect for data-intensive \ real-time applications that run across distributed devices.

Security Fix(es):

nodejs: Node.js: Unauthorized filesystem access due to Permission Model enforcement flaw (CVE-2026-58043)
nodejs: Node.js: Remote memory exhaustion via HTTP/2 retained header blocks (CVE-2026-56846)
nodejs: Node.js: Heap-use-after-free in HTTP/2 handling can lead to denial of service (CVE-2026-56848)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

References

URL

Type

	https://access.redhat.com/errata/RHSA-2026:61376	ADVISORY
	https://access.redhat.com/security/cve/CVE-2026-56846	REPORT
	https://access.redhat.com/security/cve/CVE-2026-56848	REPORT
	https://access.redhat.com/security/cve/CVE-2026-58043	REPORT
	https://bugzilla.redhat.com/2509171	REPORT
	https://bugzilla.redhat.com/2510856	REPORT
	https://errata.almalinux.org/10/ALSA-2026-61376.html	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "nodejs"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1:22.23.2-1.el10_2"
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          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "AlmaLinux:10",
        "name": "nodejs-devel"
      },
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            {
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        }
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        "name": "nodejs-docs"
      },
      "ranges": [
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          "type": "ECOSYSTEM"
        }
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    },
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      "package": {
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        "name": "nodejs-full-i18n"
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          "type": "ECOSYSTEM"
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        "ecosystem": "AlmaLinux:10",
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            }
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          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "Node.js is a platform built on Chrome\u0027s JavaScript runtime \\ for easily building fast, scalable network applications. \\ Node.js uses an event-driven, non-blocking I/O model that \\ makes it lightweight and efficient, perfect for data-intensive \\ real-time applications that run across distributed devices.  \n\nSecurity Fix(es):  \n\n  * nodejs: Node.js: Unauthorized filesystem access due to Permission Model enforcement flaw (CVE-2026-58043)\n  * nodejs: Node.js: Remote memory exhaustion via HTTP/2 retained header blocks (CVE-2026-56846)\n  * nodejs: Node.js: Heap-use-after-free in HTTP/2 handling can lead to denial of service (CVE-2026-56848)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
  "id": "ALSA-2026:61376",
  "modified": "2026-09-01T08:42:09Z",
  "published": "2026-08-31T00:00:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:61376"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-56846"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-56848"
    },
    {
      "type": "REPORT",
      "url": "https://access.redhat.com/security/cve/CVE-2026-58043"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2509171"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/2510856"
    },
    {
      "type": "ADVISORY",
      "url": "https://errata.almalinux.org/10/ALSA-2026-61376.html"
    }
  ],
  "related": [
    "CVE-2026-58043",
    "CVE-2026-56846",
    "CVE-2026-56848"
  ],
  "summary": "Important: nodejs22 security update"
}

CVE-2026-56846 (GCVE-0-2026-56846)

Vulnerability from cvelistv5 – Published: 2026-08-04 00:49 – Updated: 2026-08-04 15:03

Summary

A flaw in Node.js HTTP/2 handling can cause HTTP/2 retained header blocks evade maxSessionMemory and enable remote memory exhaustion. This vulnerability affects Node.js **24.x** and **22.x**.

Severity

7.5 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-04 14:28 UTC

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

hackerone mitre root

References

1 reference

URL	Tags
https://nodejs.org/en/blog/vulnerability/july-202…

Impacted products

1 product

Vendor	Product	Version
nodejs	node	Affected: 24.18.0 , ≤ 24.18.0 (semver) Affected: 22.23.1 , ≤ 22.23.1 (semver)

Show details on NVD website

JSON

To clipboard

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CVE-2026-56848 (GCVE-0-2026-56848)

Vulnerability from cvelistv5 – Published: 2026-08-04 15:57 – Updated: 2026-08-04 17:36

Summary

A flaw in Node.js HTTP/2 handling allows `nghttp2_session_mem_send()` to be called re-entrantly while `nghttp2_session_mem_recv()` is executing, resulting in a heap-use-after-free. This vulnerability affects Node.js **26.x**, **24.x**, and **22.x**.

Severity

7.5 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-04 17:35 UTC

CWE

CWE-416 - Use After Free

Assigner

hackerone mitre root

References

1 reference

URL	Tags
https://nodejs.org/en/blog/vulnerability/july-202…

Impacted products

1 product

Vendor	Product	Version
nodejs	node	Affected: 26.5.0 , ≤ 26.5.0 (semver) Affected: 24.18.0 , ≤ 24.18.0 (semver) Affected: 22.23.1 , ≤ 22.23.1 (semver)

Show details on NVD website

JSON

To clipboard

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                "role": "CISA Coordinator",
                "timestamp": "2026-08-04T17:35:44.952267Z",
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CVE-2026-58043 (GCVE-0-2026-58043)

Vulnerability from cvelistv5 – Published: 2026-07-30 06:02 – Updated: 2026-07-31 03:55

Summary

A flaw in Node.js Permission Model enforcement can over-grant filesystem access across radix-tree prefix boundaries. Under `--permission`, an attacker who is granted access to one path can abuse boundary handling to read from or write to paths outside the intended filesystem allowlist. This vulnerability affects Node.js **main**, **22.x**, **24.x**, and **26.x**.

Severity

7.5 (High)


                        
                          CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-30 00:00 UTC

CWE

CWE-284 - Improper Access Control - Generic

Assigner

hackerone mitre root

References

1 reference

URL	Tags
https://nodejs.org/en/blog/vulnerability/july-202…

Impacted products

1 product

Vendor	Product	Version
nodejs	node	Affected: 22.23.1 , ≤ 22.23.1 (semver) Affected: 24.18.0 , ≤ 24.18.0 (semver) Affected: 26.5.0 , ≤ 26.5.0 (semver)

Show details on NVD website

JSON

To clipboard

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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

ALSA-2026:61376

CVE-2026-56846 (GCVE-0-2026-56846)

CVE-2026-56848 (GCVE-0-2026-56848)

CVE-2026-58043 (GCVE-0-2026-58043)

Tags

Sightings

Nomenclature

Related by attack behaviour