CVE-2026-81704 json
openssl_encrypt before 1.4.9 Weak Key Derivation via D-Bus
published 2026-08-27 2 mo ago modified 2026-10-01 39 d ago also GHSA-v9r6-grch-fxw7 , PYSEC-2026-3963 , EUVD-2026-67060
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
openssl_encrypt versions before 1.4.9 contain a weak key derivation vulnerability in the D-Bus CryptoService.EncryptFile handler that uses unstretched SHA-256 instead of Argon2id. Attackers can perform offline password guessing against encrypted files roughly six to seven orders of magnitude faster than documented protection by exploiting the missing key stretching and hash rounds.
Patch / fix
- pypi openssl-encrypt 1.4.9
- jahlives openssl_encrypt 1.4.9
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| CNA | 4.0 | 8.7 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/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 |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| pypi | openssl-encrypt | <1.4.9 |
1.4.9 |
Affected products
- jahlives openssl_encrypt
Classification
- Weakness
-
- CWE-916 Use of Password Hash With Insufficient Computational Effort
References
-
github.com
/jahlives/openssl_encrypt/security/advisories/GHSA-v9r6-grch-fxw7
vendor-advisory, advisory
-
vulncheck.com
/advisories/openssl-encrypt-before-1.4.9-weak-key-derivation-via-d-bus
third-party-advisory, advisory
Sources
- CVE List CVE-2026-81704
- NVD CVE-2026-81704
- OSV PYSEC-2026-3963
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