EUVD-2026-53549
GHSA-8jj7-whc4-r6j5
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Primary impact is confidentiality of stored secrets, so C:H; attacker needs access to ciphertext and a short-secret config (PR:L, AC:H); decrypted tokens give limited integrity impact (I:L), no availability effect.
Primary rating from Vendor (ibm).
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Lifecycle Timeline
6DescriptionNVD
IBM Langflow OSS 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, 1.0.0 through 1.10.3, and 1.0.0 through 1.10.3 use Python's non-cryptographic random module for generating Fernet encryption keys from user secrets under 32 characters. The deterministic Mersenne Twister PRNG produces identical keys for identical seeds, allowing attackers to reproduce encryption keys and decrypt stored API keys and authentication tokens.
AnalysisAI
Predictable Fernet encryption keys in IBM Langflow OSS 1.0.0 through 1.10.3 allow attackers to decrypt stored API keys and authentication tokens, because when a user secret is shorter than 32 characters the platform derives keys with Python's non-cryptographic random (Mersenne Twister) module. Because the Mersenne Twister PRNG is deterministic, identical seeds reproduce identical keys, so an adversary who can reconstruct the seeding conditions can regenerate the key and read every secret Langflow encrypted with it. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two concrete prerequisites drawn from the description: (1) the deployment must use a user secret shorter than 32 characters, which triggers the vulnerable fallback to Python's `random`/Mersenne Twister key-derivation path (a full-length ≥32-character secret is not affected), and (2) the attacker must be able to obtain the Fernet-encrypted stored data - the ciphertext of API keys and authentication tokens - since the vulnerability enables decrypting already-stored secrets rather than direct remote code execution. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are mixed and should be weighed carefully. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who gains read access to a Langflow instance's backing store - for example a leaked database backup, a misconfigured volume, or a low-privilege foothold - extracts the Fernet-encrypted API keys and tokens. Knowing that a short user secret seeds the deterministic Mersenne Twister, the attacker reproduces the encryption key offline and decrypts the stored credentials, then reuses those third-party API keys and auth tokens to pivot into connected services. … |
| Remediation | Patch available per vendor advisory: IBM has released a fix (see IBM support advisory https://www.ibm.com/support/pages/node/7282648) - upgrade Langflow OSS to the fixed release above 1.10.3 identified in that advisory (an exact fixed version is not stated in the provided data, so confirm the target version directly from the IBM advisory before upgrading). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Langflow OSS deployments running versions 1.0.0 through 1.10.3 and inventory what credentials (cloud API keys, tokens, database passwords) are stored in each. …
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