Vulnerability-Lookup

RHSA-2026:67283

Vulnerability from csaf_opensuse - Published: 2026-09-14 00:00 - Updated: 2026-09-16 18:51

Summary

security update for nginx

Severity

Moderate

Notes

Title of the patch: security update for nginx

Description of the patch: This security update provides a functional equivalent of RHSA-2026:67283. The original Red Hat(R) advisory is available from the Red Hat web site at https://access.redhat.com/errata/RHSA-2026:67283.

Patchnames: RHSA-2026:67283

CVE-2026-42533

8.1 (High)


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

Affected products

Recommended 10 products

Product	Version	Remediation
Unresolved product id: SUSE Liberty Linux 9:nginx-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:nginx-all-modules-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.noarch	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:nginx-core-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:nginx-filesystem-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.noarch	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:nginx-mod-devel-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:nginx-mod-http-image-filter-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:nginx-mod-http-perl-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:nginx-mod-http-xslt-filter-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:nginx-mod-mail-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64	—	Vendor Fix
Unresolved product id: SUSE Liberty Linux 9:nginx-mod-stream-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64	—	Vendor Fix

Threats

Impact important

References

5 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/r…	self
https://www.suse.com/security/cve/CVE-2026-42533/	self
https://www.suse.com/security/cve/CVE-2026-42533	external
https://bugzilla.suse.com/1271514	external

JSON

To clipboard

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  "vulnerabilities": [
    {
      "cve": "CVE-2026-42533",
      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2026-42533"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "A vulnerability exists in NGINX Plus and NGINX Open Source when a map  directive uses regex matching and a string expression references the map\u0027s regex capture variables before referencing the map output variable. Alternatively, the same result could be achieved by using a non-cacheable variable in a string expression under certain conditions. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR.\n\nImpact:\nThis vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or to possibly trigger a code execution. There is no control plane exposure; this is a data plane issue only.\n\n\n\n\n  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
          "title": "CVE description"
        }
      ],
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      "references": [
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          "category": "external",
          "summary": "CVE-2026-42533",
          "url": "https://www.suse.com/security/cve/CVE-2026-42533"
        },
        {
          "category": "external",
          "summary": "SUSE Bug 1271514 for CVE-2026-42533",
          "url": "https://bugzilla.suse.com/1271514"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
            "SUSE Liberty Linux 9:nginx-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-all-modules-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.noarch",
            "SUSE Liberty Linux 9:nginx-core-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-filesystem-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.noarch",
            "SUSE Liberty Linux 9:nginx-mod-devel-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-http-image-filter-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-http-perl-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-http-xslt-filter-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-mail-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-stream-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "SUSE Liberty Linux 9:nginx-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-all-modules-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.noarch",
            "SUSE Liberty Linux 9:nginx-core-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-filesystem-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.noarch",
            "SUSE Liberty Linux 9:nginx-mod-devel-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-http-image-filter-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-http-perl-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-http-xslt-filter-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-mail-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64",
            "SUSE Liberty Linux 9:nginx-mod-stream-2:1.26.3-9.module+el9.8.0+24845+a897661e.4.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-09-14T00:00:00Z",
          "details": "important"
        }
      ],
      "title": "CVE-2026-42533"
    }
  ]
}

CVE-2026-42533 (GCVE-0-2026-42533)

Vulnerability from cvelistv5 – Published: 2026-07-15 14:33 – Updated: 2026-07-29 03:55

Title

NGINX Map directive and Regex matching vulnerability

Summary

A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and a string expression references the map's regex capture variables before referencing the map output variable. Alternatively, the same result could be achieved by using a non-cacheable variable in a string expression under certain conditions. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system or to possibly trigger a code execution. There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Severity

8.1 (High)


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

9.2 (Critical)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-07-15 00:00 UTC

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

f5 mitre root

References

1 reference

URL	Tags
https://my.f5.com/manage/s/article/K000162097	vendor-advisorypatch

Impacted products

2 products

Vendor	Product	Version
F5	NGINX Plus	Affected: 37.0.0.1 , < 37.0.3.1 (custom) Affected: R36 , < R36 P7 (custom) Affected: R33 , < * (custom)
F5	NGINX Open Source	Affected: 1.31.2 , < 1.31.3 (custom) Affected: 0.9.6 , < 1.30.4 (custom)

Date Public

2026-07-15 14:00

Credits

F5 acknowledges Ming Xuan, DKD (@pidifn), Ji'an Zhou, and Zhen Yan of AntAISecurityLab, Rafael Gacek, Sergii Negodiuk of EVO.company, Lam Jun Rong of Calif.io, Mufeed VH of Winfunc Research (winfunc.com), Vexera AI (https://vexera.ai), Tu Tran Dinh (@1w4y), Stan Shaw (cyberstan), qianshuidewajueji, zenneth (randomguy6407), Zhenpeng (Leo) Lin of depthfirst, Lukas Johannes Moeller, Melih Tolga Sahin of Vodafone Türkiye, Ayoub Nabil Boubagrat (GitHub: @ayoubnabil), and Milan Jovic (Kljunowsky) for independently bringing this issue to our attention and following the highest standards of coordinated disclosure.

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.