---
title: "CVE-2026-114615: Authlib - Authentication Bypass"
description: "Authlib 1.3.1 to 1.9.0 contains an authentication bypass caused by improper asymmetric-key marker checks in OctKey.import_key() allowing attackers to forge HS256 tokens using public-key bytes with prefixes, exploit requires attacker knowledge of public-key bytes."
url: https://panop.io/threat-heartbeat/CVE-2026-114615/
---

# CVE-2026-114615 Authlib - Authentication Bypass

Authlib 1.3.1 to 1.9.0 contains an authentication bypass caused by improper asymmetric-key marker checks in OctKey.import\_key() allowing attackers to forge HS256 tokens using public-key bytes with prefixes, exploit requires attacker knowledge of public-key bytes.

CVSS base score 7.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-114615)

## Details

Type

Authentication Bypass

Impact

Broken Authentication

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Published

22 October 2026

Updated

23 October 2026

Weakness

[CWE-184](https://cwe.mitre.org/data/definitions/184.html)

## Vendor fix

Update to version 1.9.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-114615](https://nvd.nist.gov/vuln/detail/CVE-2026-114615)
- [https://github.com/authlib/authlib/security/advisories/GHSA-7vr2-2fgp-9w7p](https://github.com/authlib/authlib/security/advisories/GHSA-7vr2-2fgp-9w7p)
- [https://github.com/authlib/authlib/commit/e3bd41cb29dcfee434453b135ffb487884baeedf](https://github.com/authlib/authlib/commit/e3bd41cb29dcfee434453b135ffb487884baeedf)
- [https://github.com/authlib/authlib/pull/945](https://github.com/authlib/authlib/pull/945)
- [https://github.com/authlib/authlib/releases/tag/v1.9.0](https://github.com/authlib/authlib/releases/tag/v1.9.0)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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