Vulnerability-Lookup

RHSA-2026:39812

Vulnerability from csaf_redhat - Published: 2026-07-15 10:00 - Updated: 2026-08-14 06:01

Summary

Red Hat Security Advisory: Red Hat OpenStack Services on OpenShift 18.0 (openstack-glance) security update

Severity

Important

Notes

Topic: An update for openstack-glance is now available for Red Hat OpenStack Services on OpenShift 18.0 (Antelope). Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: OpenStack Image Service (code-named Glance) provides discovery, registration, and delivery services for virtual disk images. The Image Service API server provides a standard REST interface for querying information about virtual disk images stored in a variety of back-end stores, including OpenStack Object Storage. Clients can register new virtual disk images with the Image Service, query for information on publicly available disk images, and use the Image Service's client library for streaming virtual disk images. Security Fix(es): * openstack-glance: OpenStack Glance – Unvalidated URI Fetch in OVF Processing (SSRF) () * openstack-glance: OpenStack Glance – Redirect Validation Bypass in glance-download Import (SSRF) () * OpenStack Glance: Server-Side Request Forgery leading to unauthorized internal network access (CVE-2026-34881) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2026-34881

A flaw was found in OpenStack Glance. An authenticated user can exploit a Server-Side Request Forgery (SSRF) vulnerability within the web-download import feature. This vulnerability stems from inadequate validation of Uniform Resource Identifiers (URIs), which can be circumvented using HTTP redirects or alternative IP encodings. Successful exploitation allows an attacker to gain unauthorized access to internal network resources and potentially exfiltrate sensitive data.

7.1 (High)


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

CWE-918 - Server-Side Request Forgery (SSRF)

Affected products

Fixed 3 products

Product	Version	Remediation
Unresolved product id: 9Base-RHOSO-18.0:openstack-glance-1:26.1.1-18.0.20260422134725.c2ac316.el9ost.noarch	—	Vendor Fix fix Workaround
Unresolved product id: 9Base-RHOSO-18.0:openstack-glance-1:26.1.1-18.0.20260422134725.c2ac316.el9ost.src	—	Vendor Fix fix Workaround
Unresolved product id: 9Base-RHOSO-18.0:python3-glance-1:26.1.1-18.0.20260422134725.c2ac316.el9ost.noarch	—	Vendor Fix fix Workaround

Threats

Impact Important

References

11 references

URL	Category
https://access.redhat.com/errata/RHSA-2026:39812	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=2440353	external
https://bugzilla.redhat.com/show_bug.cgi?id=2440358	external
https://bugzilla.redhat.com/show_bug.cgi?id=2440368	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2026-34881	self
https://bugzilla.redhat.com/show_bug.cgi?id=2440368	external
https://www.cve.org/CVERecord?id=CVE-2026-34881	external
https://nvd.nist.gov/vuln/detail/CVE-2026-34881	external
https://bugs.launchpad.net/glance/+bug/2138602	external

Acknowledgments

Open the Window Hyeongeun_Ji

Red Hat Abhishek Kekane

JSON

To clipboard

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          "names": [
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          ],
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        "id": "CWE-918",
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          "category": "description",
          "text": "A flaw was found in OpenStack Glance. An authenticated user can exploit a Server-Side Request Forgery (SSRF) vulnerability within the web-download import feature. This vulnerability stems from inadequate validation of Uniform Resource Identifiers (URIs), which can be circumvented using HTTP redirects or alternative IP encodings. Successful exploitation allows an attacker to gain unauthorized access to internal network resources and potentially exfiltrate sensitive data.",
          "title": "Vulnerability description"
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          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an IMPORTANT flaw in OpenStack Glance\u0027s web-download import feature allows an authenticated user to perform Server-Side Request Forgery (SSRF). The vulnerability arises from insufficient validation of URIs, which can be bypassed through HTTP redirects or alternative IP encodings. This enables an attacker to access internal network resources and potentially exfiltrate sensitive information within the cloud environment.",
          "title": "Statement"
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          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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          "category": "workaround",
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          ]
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L",
            "version": "3.1"
          },
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            "9Base-RHOSO-18.0:openstack-glance-1:26.1.1-18.0.20260422134725.c2ac316.el9ost.src",
            "9Base-RHOSO-18.0:python3-glance-1:26.1.1-18.0.20260422134725.c2ac316.el9ost.noarch"
          ]
        }
      ],
      "threats": [
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          "category": "impact",
          "details": "Important"
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      "title": "openstack-glance: OpenStack Glance: Server-Side Request Forgery leading to unauthorized internal network access"
    }
  ]
}

CVE-2026-34881 (GCVE-0-2026-34881)

Vulnerability from cvelistv5 – Published: 2026-03-31 05:29 – Updated: 2026-08-14 12:04

Summary

OpenStack Glance before 29.1.1, 30.x before 30.1.1, and 31.0.0 is affected by Server-Side Request Forgery (SSRF). By use of HTTP redirects, an authenticated user can bypass URL validation checks and redirect to internal services. Only glance image import functionality is affected. In particular, the web-download and glance-download import methods are subject to this vulnerability, as is the optional (not enabled by default) ovf_process image import plugin.

Severity

5 (Medium)


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

7.1 (High)


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

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-03-31 13:47 UTC

CWE

CWE-918 - Server-Side Request Forgery (SSRF)

Assigner

mitre mitre root

References

7 references

URL	Tags
https://bugs.launchpad.net/glance/+bug/2138602
https://security.openstack.org/ossa/OSSA-2026-004.html
https://access.redhat.com/security/cve/CVE-2026-34881	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2440368	issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v…	x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:54757	vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:39812	vendor-advisoryx_refsource_REDHAT

Impacted products

4 products

Vendor	Product	Version
OpenStack	Glance	Affected: 0 , < 29.1.1 (semver) Affected: 30.0.0 , < 30.1.1 (semver) Affected: 31.0.0 (semver) cpe:2.3:a:openstack:glance:::::::: cpe:2.3:a:openstack:glance:::::::: cpe:2.3:a:openstack:glance::::::::
Red Hat	Red Hat OpenStack Services on OpenShift 18.0	Unaffected: 1:26.1.1-18.0.20260422134725.c2ac316.el9ost , < * (rpm) cpe:/a:redhat:openstack:18.0::el9
Red Hat	Red Hat OpenStack Platform 16.2	cpe:/a:redhat:openstack:16.2
Red Hat	Red Hat OpenStack Platform 17.1	cpe:/a:redhat:openstack:17.1

Show details on NVD website

JSON

To clipboard

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                "id": "CVE-2026-34881",
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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.

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

RHSA-2026:39812

CVE-2026-34881 (GCVE-0-2026-34881)

Tags

Sightings

Nomenclature

Related by attack behaviour