Is CVE-2026-22772 in the CISA KEV catalog?

No. CVE-2026-22772 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-22772?

CVE-2026-22772 has a CVSS v3 base score of 5.8 (MEDIUM).

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

CVE-2026-22772 has an EPSS score of 0.22% (12th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-22772?

Upgrade golang-github-sigstore-fulcio on debian unstable to 1.8.5-1 or later. Fixes are available for 25 affected products.

CVE & CISA-KEV Catalog

CVE-2026-22772

MEDIUM

5.8

CVSS v3

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.

CWE-918Server-Side Request Forgery (SSRF)

How to fix

Remediation Available

golang-github-sigstore-fulcioDebian

Fixed in:1.8.5-1CVE-2026-22772

registry.redhat.io/rhtas/certificateRed Hat / RHEL

Fixed in:transparency-rhel9@sha256:240a9553315990a06a9d52eaf6e96e3aa1c743f1fbff33b95b489d41cef18f5a_amd64RHSA-2026:2144

registry.redhat.io/rhtas/certificateRocky

Fixed in:transparency-rhel9@sha256:240a9553315990a06a9d52eaf6e96e3aa1c743f1fbff33b95b489d41cef18f5a_amd64RHSA-2026:2144

registry.redhat.io/rhtas/clientRed Hat / RHEL

Fixed in:server-rhel9@sha256:47071a0613d6d262110af4ce6703ce99db72c7ab58e3a6051b82f3098b372a49_amd64RHSA-2026:2924

registry.redhat.io/rhtas/clientRocky

Fixed in:server-rhel9@sha256:47071a0613d6d262110af4ce6703ce99db72c7ab58e3a6051b82f3098b372a49_amd64RHSA-2026:2924

registry.redhat.io/rhtas/cosignRed Hat / RHEL

Fixed in:rhel9@sha256:a8289d488491991d454a32784de19476f2c984917eb7a33b4544e55512f2747c_amd64RHSA-2026:2136

Fixed in:rhel9@sha256:8efb2c8f77e91d7a15063ddc6f7eca1226a494f0f9340590af6e3a2eb9c462c3_amd64RHSA-2026:2922

registry.redhat.io/rhtas/cosignRocky

Fixed in:rhel9@sha256:8efb2c8f77e91d7a15063ddc6f7eca1226a494f0f9340590af6e3a2eb9c462c3_amd64RHSA-2026:2922

Fixed in:rhel9@sha256:a8289d488491991d454a32784de19476f2c984917eb7a33b4544e55512f2747c_amd64RHSA-2026:2136

registry.redhat.io/rhtas/fetch-tsaRed Hat / RHEL

Fixed in:certs-rhel9@sha256:e001128c079f0355e88161c08f092d0d5b0d2f984fdb672002d4bcddf9585cd5_amd64RHSA-2026:2922

Fixed in:certs-rhel9@sha256:358e6addb56ff342bc8d850399b872f039bb9cbd7f108f0838e8e50d54b24857_amd64RHSA-2026:2136

registry.redhat.io/rhtas/fetch-tsaRocky

Fixed in:certs-rhel9@sha256:358e6addb56ff342bc8d850399b872f039bb9cbd7f108f0838e8e50d54b24857_amd64RHSA-2026:2136

Fixed in:certs-rhel9@sha256:e001128c079f0355e88161c08f092d0d5b0d2f984fdb672002d4bcddf9585cd5_amd64RHSA-2026:2922

registry.redhat.io/rhtas/fulcioRocky

Fixed in:rhel9@sha256:d876a5e41b8467cdde921032f2cd53e77bef99ebcd8b61d72a3ad411469ad352_amd64RHSA-2026:2144

registry.redhat.io/rhtas/fulcioRed Hat / RHEL

Fixed in:rhel9@sha256:d876a5e41b8467cdde921032f2cd53e77bef99ebcd8b61d72a3ad411469ad352_amd64RHSA-2026:2144

registry.redhat.io/rhtas/gitsignRed Hat / RHEL

Fixed in:rhel9@sha256:3c39718e61d13648afcb5b0f5741aa771caf9b2f8c52e4af9dfa0635d5b05894_amd64RHSA-2026:2136

Fixed in:rhel9@sha256:4c59990381ce313cd845257e95fd2e910b3d84459c5b3c3aa09fce954a328101_amd64RHSA-2026:2922

registry.redhat.io/rhtas/gitsignRocky

Fixed in:rhel9@sha256:4c59990381ce313cd845257e95fd2e910b3d84459c5b3c3aa09fce954a328101_amd64RHSA-2026:2922

Fixed in:rhel9@sha256:3c39718e61d13648afcb5b0f5741aa771caf9b2f8c52e4af9dfa0635d5b05894_amd64RHSA-2026:2136

registry.redhat.io/rhtas/rekorRed Hat / RHEL

Fixed in:cli-rhel9@sha256:63db8fe95e158a74d31bcfca03a4c8d505012870d594e8fd97cc0cb2af13fe65_amd64RHSA-2026:2136

Fixed in:server-rhel9@sha256:9746960bbc79e0ecf82a0ee12f878e90e202247dcaeb046bdd11db48a52ccb90_amd64RHSA-2026:2144

Fixed in:cli-rhel9@sha256:6dc1b8af2586c0b7dc2786ed075f3e387943bed78818e02c7bd38f0ac1cace0b_amd64RHSA-2026:2922

registry.redhat.io/rhtas/rekorRocky

Fixed in:server-rhel9@sha256:9746960bbc79e0ecf82a0ee12f878e90e202247dcaeb046bdd11db48a52ccb90_amd64RHSA-2026:2144

Fixed in:cli-rhel9@sha256:6dc1b8af2586c0b7dc2786ed075f3e387943bed78818e02c7bd38f0ac1cace0b_amd64RHSA-2026:2922

Fixed in:cli-rhel9@sha256:63db8fe95e158a74d31bcfca03a4c8d505012870d594e8fd97cc0cb2af13fe65_amd64RHSA-2026:2136

registry.redhat.io/rhtas/rekor-backfillRocky

Fixed in:redis-rhel9@sha256:ec50096d68a499e7f605bcfa7afd30845a03e0c4849736431f6752fa8b850897_amd64RHSA-2026:2144

registry.redhat.io/rhtas/rekor-backfillRed Hat / RHEL

Fixed in:redis-rhel9@sha256:ec50096d68a499e7f605bcfa7afd30845a03e0c4849736431f6752fa8b850897_amd64RHSA-2026:2144

registry.redhat.io/rhtas/rekor-searchRocky

Fixed in:ui-rhel9@sha256:3971738912069448174202486b61ed384153ca18af3e8430a55795a6e65eb58d_amd64RHSA-2026:2144

registry.redhat.io/rhtas/rekor-searchRed Hat / RHEL

Fixed in:ui-rhel9@sha256:3971738912069448174202486b61ed384153ca18af3e8430a55795a6e65eb58d_amd64RHSA-2026:2144

registry.redhat.io/rhtas/timestampRed Hat / RHEL

Fixed in:authority-rhel9@sha256:37b9359f11098a781158e5bc0850ec43b599d29a354b43745067656b0a234814_amd64RHSA-2026:2144

registry.redhat.io/rhtas/timestampRocky

Fixed in:authority-rhel9@sha256:37b9359f11098a781158e5bc0850ec43b599d29a354b43745067656b0a234814_amd64RHSA-2026:2144

registry.redhat.io/rhtas/trillianRed Hat / RHEL

Fixed in:logsigner-rhel9@sha256:83a8710df2032471c379f4cfbb3861ec9c4c7794f8b487483dbfb8cf57207750_amd64RHSA-2026:2144

Fixed in:redis-rhel9@sha256:7261ee18d6fd8d42614e94ae3bdb77c5acad54f2b9898365bf8668c60a32589a_amd64RHSA-2026:2144

Fixed in:logserver-rhel9@sha256:7c6cba78fb26addd9f056ec3f8b9376666db353451da37a4681a51d16f2ff76c_amd64RHSA-2026:2144

Fixed in:database-rhel9@sha256:f4e92bf3f35d86fe895a2e3225098b3d4d9dae720ef1d45e9efcf23dec8242b6_amd64RHSA-2026:2144

registry.redhat.io/rhtas/trillianRocky

Fixed in:redis-rhel9@sha256:7261ee18d6fd8d42614e94ae3bdb77c5acad54f2b9898365bf8668c60a32589a_amd64RHSA-2026:2144

Fixed in:logsigner-rhel9@sha256:83a8710df2032471c379f4cfbb3861ec9c4c7794f8b487483dbfb8cf57207750_amd64RHSA-2026:2144

Fixed in:logserver-rhel9@sha256:7c6cba78fb26addd9f056ec3f8b9376666db353451da37a4681a51d16f2ff76c_amd64RHSA-2026:2144

Fixed in:database-rhel9@sha256:f4e92bf3f35d86fe895a2e3225098b3d4d9dae720ef1d45e9efcf23dec8242b6_amd64RHSA-2026:2144

registry.redhat.io/rhtas/updatetreeRocky

Fixed in:rhel9@sha256:67ff8332c09e00cb370355d16f1d06c16ff482e7a8857cdff4f556fae298f951_amd64RHSA-2026:2136

Fixed in:rhel9@sha256:cfba6d424b5e45362bb4e61d9b05bb49a24beb56a3c5ddc3aebdd2e0647179de_amd64RHSA-2026:2922

registry.redhat.io/rhtas/updatetreeRed Hat / RHEL

Fixed in:rhel9@sha256:67ff8332c09e00cb370355d16f1d06c16ff482e7a8857cdff4f556fae298f951_amd64RHSA-2026:2136

Fixed in:rhel9@sha256:cfba6d424b5e45362bb4e61d9b05bb49a24beb56a3c5ddc3aebdd2e0647179de_amd64RHSA-2026:2922

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.22%probability of exploitation in 30 days

12thpercentile

Low risk: more likely to be exploited than 12% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Related Vulnerabilities

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-21893	High	8.2	100%	KEV + Ransom	-
CVE-2021-40438	Critical	9.0	100%	KEV	Fix
CVE-2021-34473	Critical	9.1	100%	KEV + Ransom	Fix
CVE-2021-26855	Critical	9.1	100%	KEV + Ransom	Fix
CVE-2021-21985	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-41040	High	8.8	100%	KEV + Ransom	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-03-05.