CVE-2026-81720— openssl_encrypt before 1.4.9 Denial of Service via Unbounded Argon2
Quick assessment
Affected
jahlives openssl_encrypt
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 1.4.9 版本之前的 openssl_encrypt 未能验证身份文件保护块中的 memory_cost 参数，使得攻击者能够在密钥推导过程中触发内存溢出（out-of-memory）条件。拥有本地身份存储写权限的攻击者可以构造包含过高 memory_cost 值的恶意身份文件，导致主机在认证前解锁身份时发生崩溃。
Affected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| jahlives | openssl_encrypt | < 1.4.9 |
affected |
1.4.9 |
unaffected |
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I. Basic Information for CVE-2026-81720
Vulnerability Information
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Vulnerability Title
openssl_encrypt before 1.4.9 Denial of Service via Unbounded Argon2
Source: CVE Program / CVE List V5
Vulnerability Description
openssl_encrypt before 1.4.9 fails to validate the memory_cost parameter from identity file protection blocks, allowing attackers to trigger out-of-memory conditions during key derivation. Attackers with write access to local identity stores can craft malicious identity files with excessive memory_cost values that cause the host to crash when unlocking identities before authentication.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| jahlives | openssl_encrypt | 0 ~ 1.4.9 | - |
|
II. Public POCs for CVE-2026-81720
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-81720 (2)
Same Patch Batch · jahlives · 2026-08-27 · 36 CVEs total
| CVE-2026-81707 | 9.8 CRITICAL | openssl_encrypt before 1.4.9 ANSI Escape Injection via Identity Email |
| CVE-2026-81702 | 9.8 CRITICAL | openssl_encrypt before 1.4.9 Key Substitution via Identity Load |
| CVE-2026-81701 | 9.8 CRITICAL | openssl_encrypt before 1.4.9 Arbitrary Code Execution via unsigned plugin |
| CVE-2026-81700 | 9.8 CRITICAL | openssl_encrypt before 1.4.9 GPG Signature Verification Bypass |
| CVE-2026-81683 | 8.4 HIGH | openssl_encrypt before 1.4.9 Plaintext Private Key Storage |
| CVE-2026-81719 | 7.8 HIGH | openssl_encrypt before 1.4.9 Remote Code Execution via Plugin |
| CVE-2026-81688 | 7.5 HIGH | openssl_encrypt before 1.4.9 Plaintext Confirmation Oracle via SHA-256 |
| CVE-2026-81692 | 7.5 HIGH | openssl_encrypt before 1.4.9 Denial of Service via STREAMINFO |
| CVE-2026-81699 | 7.5 HIGH | openssl_encrypt before 1.4.9 Denial of Service via unbounded KDF cost |
| CVE-2026-81689 | 7.5 HIGH | openssl_encrypt before 1.4.9 Weak Pepper Key Derivation |
| CVE-2026-81705 | 7.5 HIGH | openssl-encrypt before 1.4.9 Password Cleartext Leak via Debug |
| CVE-2026-81718 | 7.5 HIGH | openssl_encrypt before 1.4.9 Weak Cryptographic Parameters |
| CVE-2026-81691 | 7.5 HIGH | openssl_encrypt before 1.4.9 Credential Leakage via Unvalidated Server URLs |
| CVE-2026-81693 | 7.5 HIGH | openssl_encrypt before 1.4.9 Denial of Service via QR total field |
| CVE-2026-81698 | 7.5 HIGH | openssl_encrypt before 1.4.9 Shell Injection via info command |
| CVE-2026-81704 | 7.5 HIGH | openssl_encrypt before 1.4.9 Weak Key Derivation via D-Bus |
| CVE-2026-81721 | 7.5 HIGH | openssl_encrypt before 1.4.9 Denial of Service via KDF |
| CVE-2026-81690 | 7.3 HIGH | verify-usb before 1.4.9 Symlink Directory Traversal Code Execution |
| CVE-2026-81714 | 7.0 HIGH | openssl_encrypt before 1.4.9 Plugin Signing Trust Anchor Enrollment Bypass |
| CVE-2026-81706 | 6.8 MEDIUM | openssl_encrypt before 1.4.9 Key Substitution via Identity Shadowing |
Showing top 20 of 36 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: openssl_encrypt
-
CVE-2026-81721
openssl_encrypt before 1.4.9 Denial of Service via KDF -
CVE-2026-81719
openssl_encrypt before 1.4.9 Remote Code Execution via Plugi -
CVE-2026-81718
openssl_encrypt before 1.4.9 Weak Cryptographic Parameters -
CVE-2026-81717
openssl_encrypt before 1.4.9 Integrity Bypass via Added File -
CVE-2026-81716
openssl_encrypt before 1.4.9 Plugin Sandbox Path Traversal
Same vendor: jahlives
-
CVE-2026-81721
openssl_encrypt before 1.4.9 Denial of Service via KDF -
CVE-2026-81719
openssl_encrypt before 1.4.9 Remote Code Execution via Plugi -
CVE-2026-81718
openssl_encrypt before 1.4.9 Weak Cryptographic Parameters -
CVE-2026-81717
openssl_encrypt before 1.4.9 Integrity Bypass via Added File -
CVE-2026-81716
openssl_encrypt before 1.4.9 Plugin Sandbox Path Traversal
Same weakness: CWE-400
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CVE-2026-81725
NLTK before 3.10.3 Regular Expression Denial of Service via -
CVE-2026-81723
NLTK before 3.10.3 Quadratic CPU Exhaustion via XMLCorpusVie -
CVE-2026-81721
openssl_encrypt before 1.4.9 Denial of Service via KDF -
CVE-2026-81687
openssl_encrypt before 1.4.9 Denial of Service via KDF -
CVE-2026-62326
Weblate Has Uncontrolled Resource Consumption via
V. Comments for CVE-2026-81720
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