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karakeep CVE-2026-75773

| EUVDEUVD-2026-60580 LOW
Improper Restriction of Excessive Authentication Attempts (CWE-307)
2026-08-18 VulDB GHSA-2ccr-52p8-6754
2.9
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.9 MEDIUM
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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
3.7 LOW

Network-reachable unauthenticated endpoint (AV:N, PR:N), but credential success depends on weak target passwords beyond attacker control (AC:H); impact limited to partial confidentiality with no integrity or availability consequences.

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

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/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
High
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

5
Source Code Evidence Fetched
Aug 18, 2026 - 11:31 vuln.today
Analysis Generated
Aug 18, 2026 - 11:31 vuln.today
Severity Changed
Aug 18, 2026 - 11:22 NVD
MEDIUM LOW
CVSS changed
Aug 18, 2026 - 11:22 NVD
6.3 (MEDIUM) 2.9 (LOW)
CVE Published
Aug 18, 2026 - 11:00 cve.org
LOW 2.9

DescriptionCVE.org

A vulnerability was found in karakeep-app karakeep up to 0.32.0. The affected element is the function authorize of the file apps/web/server/auth.ts of the component Login Endpoint. The manipulation results in improper restriction of excessive authentication attempts. The attack may be performed from remote. This attack is characterized by high complexity. The exploitability is described as difficult. The exploit has been made public and could be used. Upgrading to version 0.33.0 is sufficient to fix this issue. The patch is identified as f7d042971d0d2bcc7119654830cf1eb93eabbf24. It is advisable to upgrade the affected component.

AnalysisAI

Unlimited authentication attempts against the karakeep login endpoint (apps/web/server/auth.ts) in versions up to 0.32.0 enable remote credential brute-forcing due to a missing rate-limiting guard on the NextAuth authorize function (CWE-307). The CVSS 4.0 score of 2.9 with AC:H reflects that successful exploitation depends on the target account holding a guessable password - a condition outside the attacker's direct control. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Identify exposed karakeep login endpoint
Delivery
Enumerate registered email addresses
Exploit
Submit automated credential-stuffing requests with no rate-limit enforcement
Execution
Match account with guessable password
Persist
Authenticate and obtain valid session
Impact
Access victim bookmark and read-later data

Vulnerability AssessmentAI

Exploitation The login endpoint is network-reachable and requires no prior authentication or session state, making the attack surface accessible to any remote actor (PR:N in both CVSS assessments). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 base vector AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N yields a score of 2.9, placing this at the low end of severity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker enumerates a publicly exposed karakeep instance and identifies a registered user's email address from a prior data breach or public profile. Using an automated credential-stuffing tool seeded with commonly leaked passwords, the attacker submits thousands of unauthenticated POST requests to the login endpoint with no server-side throttle to interrupt them. …
Remediation Upgrade to karakeep version 0.33.0, available at https://github.com/karakeep-app/karakeep/releases/tag/mcp/v0.33.0 (patch commit f7d042971d0d2bcc7119654830cf1eb93eabbf24). … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-75773 vulnerability details – vuln.today

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