CVE-2026-81700 Vulnerability Analysis & Exploit Details

CVE-2026-81700
Vulnerability Scoring

9.8
/10
Critical Risk

As a catastrophic security flaw, CVE-2026-81700 has severe implications, demanding immediate intervention.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or 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-2026-81700 Details

Status: Analyzed

Last updated: 🕕 01 Sep 2026, 18:13 UTC
Originally published on: 🕔 27 Aug 2026, 17:21 UTC

Time between publication and last update: 5 days

CVSS Release: version 3

CVSS3 Source

disclosure@vulncheck.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2026-81700 Vulnerability Summary

CVE-2026-81700: openssl_encrypt versions before 1.4.9 contain a signature verification vulnerability in gpg_runner.verify_detached that accepts revoked and expired keys by only checking VALIDSIG status without inspecting REVKEYSIG, EXPKEYSIG, or gpg exit codes. Attackers holding compromised-then-revoked signing keys or expired project keys can bypass signature verification to execute malicious plugins in the host process.

Assessing the Risk of CVE-2026-81700

Access Complexity Graph

The exploitability of CVE-2026-81700 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-2026-81700

With low attack complexity and no required privileges, CVE-2026-81700 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

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-2026-81700, 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-2026-81700, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2026-81700 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2026-81700 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: High
    CVE-2026-81700 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2026-81700 References

External References

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:jahlives:openssl_encrypt:0.2.2:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.2.2:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.2.3:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.2.3:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.2.4:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.2.4:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.2.5:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.2.5:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.2.6:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.2.6:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.3.0:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.3.0:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.3.1:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.3.1:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.3.2:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.3.2:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.3.3:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.3.3:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.4.0:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.4.0:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.4.1:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.4.1:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.4.2:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.4.2:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.4.3:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.4.3:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.4.4:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.4.4:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.5.0:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.5.0:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.5.1:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.5.1:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.5.3:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.5.3:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.6.0:rc1:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.6.0:rc1:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.7.0:rc2:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.7.0:rc2:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.7.1:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.7.1:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.7.2:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.7.2:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.8.0:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.8.0:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.8.1:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.8.1:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.8.2:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.8.2:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:0.9.2:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:0.9.2:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.0.0:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.0.0:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.0.1:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.0.1:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.0.2:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.0.2:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.0.3:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.0.3:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.1.0:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.1.0:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.2.0:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.2.0:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.2.1:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.2.1:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.3.0:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.3.0:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.3.1:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.3.1:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.3.2:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.3.2:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.3.3:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.3.3:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.3.4:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.3.4:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.3.5:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.3.5:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.3.6:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.3.6:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:-:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:-:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta3:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta3:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta4:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta4:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta5:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta5:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta6:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta6:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta7:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta7:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta8:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.0:beta8:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.1:-:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.1:-:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.1:rc1:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.1:rc1:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.1:rc2:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.1:rc2:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.2:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.2:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.3:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.3:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.4:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.4:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.5:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.5:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.6:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.6:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.7:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.7:*:*:*:*:python:*:*
  • cpe:2.3:a:jahlives:openssl_encrypt:1.4.8:*:*:*:*:python:*:*
    cpe:2.3:a:jahlives:openssl_encrypt:1.4.8:*:*:*:*:python:*:*

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