CVE-2026-34881Public exploitNetwork attack vector

Authenticated internal-service access via unvalidated redirects

Published Mar 31, 2026 · Updated Mar 31, 2026

SSRF in OpenStack Glance before 29.1.1, 30.0.0 through 30.1.0, and 31.0.0 lets remote authenticated users reach internal services. The web-download and glance-download paths follow redirects without revalidating destinations; web-download also accepts encoded IP addresses, while ovf_process calls urlopen without URI validation. Image-import permission is required, and ovf_process exposure additionally requires the optional plugin; the result is limited to causing Glance to issue requests to otherwise disallowed internal endpoints.

CVSS severity5.0
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in OpenStack Glance before 29.1.1, 30.0.0 through 30.1.0, and 31.0.0 lets remote authenticated users reach internal services. The web-download and glance-download paths follow redirects without revalidating destinations; web-download also accepts encoded IP addresses, while ovf_process calls urlopen without URI validation. Image-import permission is required, and ovf_process exposure additionally requires the optional plugin; the result is limited to causing Glance to issue requests to otherwise disallowed internal endpoints.

The record

CVE
CVE-2026-34881
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
OpenStack
Product
Glance
Classifications
CWE-918, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <29.1.1
  2. Affected versionversion=30.0.0 <30.1.1
  3. Affected versionversion=31.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OpenStack · Glanceversion=0 <29.1.1; version=30.0.0 <30.1.1; version=31.0.0

Published CVSS scores

5.0GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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