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  4. CVE 2026 81688 opensslencrypt before 149 plaintext confirmation
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Back to active CVEs
High · CVSS 8.7CVE-2026-81688

openssl_encrypt before 1.4.9 Plaintext Confirmation Oracle via SHA-256CVE-2026-81688

Answer in brief

CVE-2026-81688 records a High severity (CVSS 8.7) vulnerability in openssl_encrypt before 1.4.9 Plaintext Confirmation Oracle via SHA-256. The current sources do not mark it as known exploited. The current feed maps jahlives/openssl_encrypt (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 27, 2026Updated Oct 1, 2026Source checked Oct 11, 2026First seen by HOL Aug 27, 2026Material review Oct 1, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.7
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 8.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps jahlives/openssl_encrypt (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:jahlives:openssl_encrypt:*:*:*:*:*:python:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
jahlives/openssl_encryptgeneric>=0 <1.4.91.4.9

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for jahlives/openssl_encrypt.
  2. 2Review the reported fix. Update jahlives/openssl_encrypt to 1.4.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 27, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 1, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 27, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source description

openssl_encrypt versions before 1.4.9 store an unkeyed SHA-256 hash of the plaintext in the cleartext file header metadata. Attackers can read this hash without the password to confirm guessed plaintexts offline or fingerprint identical plaintexts across separately-encrypted files.

Quoted source text, attributed separately from HOL analysis.

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Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-311
Source
CVE List V5
Source checked
Oct 11, 2026
References
2 linked sources
Open source record