MEDIUM

CVE-2026-22772

CVSS v3

5.8

MEDIUM

EPSS Score

0.2 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

github.com/sigstore/fulcioGoall versions · fixed in 1.8.5

Vendor advisories

CVE-2026-22772 Red Hat Product Security114 products fixed · 239 known affected
fulcio: Fulcio: Server-Side Request Forgery (SSRF) via unanchored regex in MetaIssuer URL validation
assisted/agent-preinstall-image-builder-rhel9 as a component of Assisted Installer for Red Hat OpenShift Container Platform 2 · rhai/assisted-installer-controller-rhel9 as a component of Assisted Installer for Red Hat OpenShift Container Platform 2 · compliance/openshift-compliance-must-gather-rhel8 as a component of Compliance Operator
RHSA-2026:37387 Red Hat Product Security108 products fixed
Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.22.0 security, enhancement & bug fix update
RHSA-2026:2924 Red Hat Product Security1 product fixed
Red Hat Security Advisory: RHTAS 1.2.2 - Red Hat Trusted Artifact Signer Release
RHSA-2026:2922 Red Hat Product Security2 products fixed
Red Hat Security Advisory: RHTAS 1.2.2 - Red Hat Trusted Artifact Signer Release
RHSA-2026:2144 Red Hat Product Security1 product fixed
Red Hat Security Advisory: RHTAS 1.3.2 - Red Hat Trusted Artifact Signer Release
RHSA-2026:2136 Red Hat Product Security2 products fixed
Red Hat Security Advisory: RHTAS 1.3.2 - Red Hat Trusted Artifact Signer Release

Full record on NVD

Description

Fulcio is a certificate authority for issuing code signing certificates for an OpenID Connect (OIDC) identity. Prior to 1.8.5, Fulcio's metaRegex() function uses unanchored regex, allowing attackers to bypass MetaIssuer URL validation and trigger SSRF to arbitrary internal services. Since the SSRF only can trigger GET requests, the request cannot mutate state. The response from the GET request is not returned to the caller so data exfiltration is not possible. A malicious actor could attempt to probe an internal network through Blind SSRF. This vulnerability is fixed in 1.8.5.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Published: 2026-01-12
Last Modified: 2026-03-05

Frequently asked questions

What is CVE-2026-22772?

Is CVE-2026-22772 actively exploited?

Active exploitation of CVE-2026-22772 has not been confirmed. Its EPSS score was 0.2% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-22772?

CVE-2026-22772 has a CVSS v3 base score of 5.8 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N.

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