CVE-2026-116071

rotki before 1.44.2 Weak Key Derivation for Premium Cloud Backup Encryption

Published Oct 25, 2026 CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed

Description

rotki before 1.44.2 contains a weak key derivation vulnerability that allows attackers to brute-force backups because the premium sync key is a single unsalted SHA-256 of the user password. Attackers who obtain an uploaded backup blob can run GPU-parallel offline password guessing and decrypt the database containing exchange API keys, secrets, wallet addresses and transaction history.

Analysis

Technical impact

Rotki before 1.44.2 uses a weak key derivation for premium cloud backup encryption, where the sync key is derived by a single unsalted SHA‑256 of the user password. This weak derivation allows attackers who obtain a backup blob to perform GPU‑parallel offline password guessing and recover the database containing exchange API keys, secrets, wallet addresses and transaction history.

Affected Systems

The vulnerability affects the Rotki application distributed by rotki:rotki, and applies to all installations prior to version 1.44.2 that enable premium cloud backup.

Risk and Exploitability

The CVSS score is 8.2, indicating high severity. No EPSS score is available, so the exploitation probability remains unknown, and the vulnerability is not listed in the CISA KEV catalog. The likely attack vector is an offline file‑based attack, requiring an attacker to obtain a backup blob and then brute‑force the encryption key to decrypt the backup contents.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

rotki

unaffected

Version	Status	Constraints
`0`	affected	< 1.44.2

No data.

Vendor Product Versions

Rotki

Version	Status	Scheme	Platform
`[0,1.44.2)`	affected	semver	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade rotki to version 1.44.2 or later
Recreate backups with the updated version to use stronger key derivation
Delete or securely delete any existing backup files generated with the vulnerable key derivation before performing the upgrade

Generated by OpenCVE AI on October 25, 2026 at 14:22 UTC.

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.201% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://github.com/rotki/rotki
https://github.com/rotki/rotki/blob/v1.44.1/rotkehlchen/crypto.py#L17-L45
https://github.com/rotki/rotki/blob/v1.44.1/rotkehlchen/data_handler.py#L263-L294
https://github.com/rotki/rotki/issues/13393
https://github.com/rotki/rotki/pull/13401
https://github.com/rotki/rotki/releases/tag/v1.44.2
https://www.vulncheck.com/advisories/rotki-before-1.44.2-weak-key-derivation-for-premium-cloud-backup-encryption

History

Oct 31, 2026 10:30 AM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Oct 26, 2026 7:15 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Rotki Rotki rotki
Vendors & Products		Rotki Rotki rotki

Oct 25, 2026 12:30 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		rotki before 1.44.2 contains a weak key derivation vulnerability that allows attackers to brute-force backups because the premium sync key is a single unsalted SHA-256 of the user password. Attackers who obtain an uploaded backup blob can run GPU-parallel offline password guessing and decrypt the database containing exchange API keys, secrets, wallet addresses and transaction history.
Title		rotki before 1.44.2 Weak Key Derivation for Premium Cloud Backup Encryption
Weaknesses		CWE-916
References		https://github.com/rotki/rotki https://github.com/rotki/rotki/blob/v1.44.1/rotkehlchen/crypto.py#L17-L45 https://github.com/rotki/rotki/blob/v1.44.1/rotkehlchen/data_handler.py#L263-L294 https://github.com/rotki/rotki/issues/13393 https://github.com/rotki/rotki/pull/13401 https://github.com/rotki/rotki/releases/tag/v1.44.2 https://www.vulncheck.com/advisories/rotki-before-1.44.2-weak-key-derivation-for-premium-cloud-backup-encryption
Metrics		cvssV3_1 `{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}` cvssV4_0 `{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}`