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TI-2023-16376 Aliases CVE-2023-33199GHSA-frqx-jfcm-6jjr

malformed proposed intoto v0.0.2 entries can cause a panic in Rekor

Priority LOW 31CWE-617Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-617.

Summary

Rekor's goals are to provide an immutable tamper resistant ledger of metadata generated within a software projects supply chain. A malformed proposed entry of the `intoto/v0.0.2` type can cause a panic on a thread within the Rekor process. The thread is recovered so the client receives a 500 error message and service still continues, so the availability impact of this is minimal. This has been fixed in v1.2.0 of Rekor. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0067 52nd percentileScored 2026-11-07
Fix Fixed rekor (sigstore): 1.2.0github.com/sigstore/rekor (Go): 1.2.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
sigstorerekorbefore 1.2.01.2.0Patch availableCNA
—github.com/sigstore/rekor (Go)before 1.2.01.2.0Patch availableGHSA-frqx-jfcm-6jjr
  • rekor Vendorsigstore Affected before 1.2.0 Fixed in 1.2.0 Patch available CNA
  • github.com/sigstore/rekor (Go) Vendor— Affected before 1.2.0 Fixed in 1.2.0 Patch available GHSA-frqx-jfcm-6jjr

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:rekor:*:*:*:*:*:*:*:*before 1.2.0Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:rekor:*:*:*:*:*:*:*:* Versions before 1.2.0 Vulnerable ·backstage

Remediation

  • Fix · CNA rekor (sigstore) Fixed in 1.2.0
  • Fix · GHSA-frqx-jfcm-6jjr github.com/sigstore/rekor (Go) Fixed in 1.2.0 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-33199
  2. 2026-10-03 Alias added: GHSA-frqx-jfcm-6jjr

References

Patch 1

Advisory 2

Other 1

  • TI-2022-16356 False positive signature verification in cosign CVSS 3.1CRITICAL 9.8
  • TI-2026-36084 sigstore-js: `certificateOIDs` verification constraints are silently dropped and never enforced CVSS 3.1HIGH 7.5
  • TI-2024-19670 Cosign vulnerable to machine-wide denial of service via malicious artifacts CVSS 3.1HIGH 7.5
  • TI-2026-18290 Fulcio vulnerable to Server-Side Request Forgery (SSRF) via MetaIssuer Regex Bypass CVSS 3.1MEDIUM 5.8
  • TI-2026-36085 sigstore-js: Insufficient Verification of Data Authenticity CVSS 3.1MEDIUM 6.5
  • TI-2024-19669 Cosign vulnerable to system-wide denial of service via malicious attachments CVSS 3.1MEDIUM 5.9
See all 39 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences