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Fencer Intel
high 7.1

CVE-2026-34881 json

OpenStack Glance is affected by Server-Side Request Forgery (SSRF)

published 7mo ago modified 2mo ago also GHSA-mc26-q38v-83gv , PYSEC-2026-2492 , EUVD-2026-17323

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

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.

Patch / fix

  • pypi glance 29.2.0, 30.2.0, 31.1.0
  • OpenStack Glance 29.1.1, 30.1.1
  • Red Hat Red Hat OpenStack Services on OpenShift 18.0 1:26.1.1-18.0.20260422134725.c2ac316.el9ost
  • glance Debian 12 2:25.1.0-2+deb12u2
  • glance Debian 13 2:30.0.0-3+deb13u1
  • glance Debian 14 2:31.0.0-3

debian advisories DEBIAN-CVE-2026-34881

  • glance Ubuntu Pro 18.04 LTS 2:16.0.1-0ubuntu1.1+esm2
  • glance Ubuntu Pro 20.04 LTS 2:20.2.0-0ubuntu1.2+esm2

ubuntu advisories UBUNTU-CVE-2026-34881

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • etcd openstack 16.2 3.3.23-22.el8ost
  • erlang openstack 16.2 23.3.4.18-2.el8ost
  • erlang-ssl openstack 16.2 23.3.4.18-2.el8ost
  • erlang-asn1 openstack 16.2 23.3.4.18-2.el8ost
  • erlang-erts openstack 16.2 23.3.4.18-2.el8ost
  • erlang-hipe openstack 16.2 23.3.4.18-2.el8ost
  • erlang-sasl openstack 16.2 23.3.4.18-2.el8ost
  • erlang-snmp openstack 16.2 23.3.4.18-2.el8ost

red hat advisories RHSA-2026:54757RHSA-2026:39812

Is CVE-2026-34881 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-34881 updated cvss 7.1

openstack-glance: OpenStack Glance: Server-Side Request Forgery leading to unauthorized internal network access

  • Red Hat OpenStack Platform 17.1 python3-glance, openstack-glance
    affected: workaround, no fix available
  • Red Hat OpenStack Platform 16.2 python3-glance 19.0.5-2.20260512165254.eb6ad61.el8ost, openstack-glance 19.0.5-2.20260512165254.eb6ad61.el8ost
    fixed: vendor fix RHSA-2026:54757
  • Red Hat OpenStack Services on OpenShift 18.0 python3-glance 26.1.1-18.0.20260422134725.c2ac316.el9ost, openstack-glance 26.1.1-18.0.20260422134725.c2ac316.el9ost
    fixed: vendor fix RHSA-2026:39812
  • Red Hat OpenStack Platform 16.2 etcd 3.3.23-22.el8ost, erlang 23.3.4.18-2.el8ost, python-pyasn1 0.4.6-4.el8ost, erlang-ssl 23.3.4.18-2.el8ost, python3-pyasn1 0.4.6-4.el8ost, erlang-asn1 23.3.4.18-2.el8ost, +79 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
7mo ago

Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • bugs.launchpad.net https://bugs.launchpad.net/glance/+bug/2138602 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 5.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
CISA ADP 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L
OSV 3.1 5.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N
GitHub 3.1 5.0 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi glance
<29.2.0
>=30.0.0, <30.2.0
>=31.0.0, <31.1.0
29.2.0
30.2.0
31.1.0

Affected products

  • OpenStack Glance
  • Red Hat Red Hat OpenStack Services on OpenShift 18.0
  • Red Hat Red Hat OpenStack Platform 16.2
  • Red Hat Red Hat OpenStack Platform 17.1

Classification

Weakness
  • CWE-918 Server-Side Request Forgery

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.