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CVE-2023-33199

18
FAUCET Score

CVE-2023-33199 is a denial-of-service vulnerability affecting Rekor, a software supply chain metadata ledger. A specially crafted "intoto/v0.0.2" entry can trigger a panic in a Rekor process thread, leading to a 500 error for the client, though the service itself remains operational. Rated Medium (CVSS 5.3), this vulnerability requires no user interaction and has low availability impact. There is no known exploit code, active exploitation, or significant community discussion surrounding this CVE. Users are advised to upgrade to Rekor v1.2.0 to remediate this issue.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.2.0CPE matchmatch criteria
cpe:2.3:a:linuxfoundation:rekor:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.67%
Probability of exploitation in next 30 days
EPSS Percentile
48.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0067 is in the 30th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/sigstore/rekorFixed in: 1.2.0
microsoftpatch availablevia msrc
Product: cbl2 skopeo 1.12.0-3 on CBL Mariner 2.0Fixed in: 1.12.0-3

Vendor Advisories (2)

goGHSA-frqx-jfcm-6jjrmedium

malformed proposed intoto entries can cause a panic

May 26, 2023
microsoft2023-May/CVE-2023-33199Moderate

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

May 9, 2023

References

github.com / sigstore/rekor/commit/140c5add105179e5ffd9e3e114fd1b6b93aebbd4
Patch
github.com / sigstore/rekor/security/advisories/GHSA-frqx-jfcm-6jjr
Vendor Advisory