CVE-2026-33467 Vulnerability Analysis & Exploit Details

CVE-2026-33467
Vulnerability Scoring

5.9

/10

Significant Risk

Security assessments indicate that CVE-2026-33467 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

Attack Complexity: High
Exploits require significant effort and special conditions.
Attack Vector: Network
Vulnerability is exploitable over a network without physical access.
Privileges Required: None
No privileges are required for exploitation.
Scope: Unchanged
Exploit remains within the originally vulnerable component.
User Interaction: None
No user interaction is necessary for exploitation.

CVE-2026-33467 Details

Status: Analyzed

Last updated: 🕠 05 May 2026, 17:55 UTC
Originally published on: 🕙 28 Apr 2026, 22:16 UTC

Time between publication and last update: 6 days

CVSS Release: version 3

CVSS3 Source

security@elastic.co

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2026-33467 Vulnerability Summary

CVE-2026-33467: Improper Verification of Cryptographic Signature (CWE-347) in Elastic Package Registry could allow an attacker positioned to intercept network traffic, or to otherwise influence the contents served to a self-hosted registry, to substitute a tampered package without the integrity check failing closed.

Assessing the Risk of CVE-2026-33467

Access Complexity Graph

The exploitability of CVE-2026-33467 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-33467

CVE-2026-33467 presents a challenge to exploit due to its high attack complexity, but the absence of privilege requirements still makes it a viable target for skilled attackers. A thorough security review is advised.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-33467, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-33467, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Confidentiality: None
CVE-2026-33467 has no significant impact on data confidentiality.
Integrity: High
CVE-2026-33467 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
Availability: None
CVE-2026-33467 does not impact system availability.

CVE-2026-33467 References

External References

https://discuss.elastic.co/t/elastic-package-registry-1-38-0-security-update-esa-2026-27/386081

CWE Common Weakness Enumeration

CWE-347

CAPEC Common Attack Pattern Enumeration and Classification

Padding Oracle Crypto Attack CAPEC-463 An adversary is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an adversary is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an adversary is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key.
Signature Spoofing by Improper Validation CAPEC-475 An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.

Vulnerable Configurations

cpe:2.3:a:elastic:elastic_package_registry:0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.1.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.2.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.2.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.4.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.4.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.6.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.6.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.7.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.7.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.7.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.7.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.8.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.8.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.9.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.9.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.10.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.10.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.11.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.11.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.12.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.12.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.12.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.12.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.13.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.13.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.14.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.14.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.15.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.15.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.16.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.16.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.17.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.17.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.18.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.18.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.19.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.19.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.20.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.20.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.21.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:0.21.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.3.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.4.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.4.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.5.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.5.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.6.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.7.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.8.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.8.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.9.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.10.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.10.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.11.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.11.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.12.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.12.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.12.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.12.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.13.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.13.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.14.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.14.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.15.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.15.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.16.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.16.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.16.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.16.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.16.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.16.2:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.16.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.16.3:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.17.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.17.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.18.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.18.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.19.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.19.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.20.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.20.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.21.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.21.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.22.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.22.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.23.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.23.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.23.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.23.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.24.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.24.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.24.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.24.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.25.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.25.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.26.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.26.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.27.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.27.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.28.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.28.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.29.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.29.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.30.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.30.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.30.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.30.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.31.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.31.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.31.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.31.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.32.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.32.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.32.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.32.1:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.33.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.33.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.34.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.34.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.35.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.35.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.36.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.36.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.37.0:*:*:*:*:*:*:*
cpe:2.3:a:elastic:elastic_package_registry:1.37.0:*:*:*:*:*:*:*

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