# OAuthlib vulnerabilities

Source: https://junglewise.ai/threats/vendors/oauthlib  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 13 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/oauthlib.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in OAuthlib: 0 in the last 7 days and 4 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-49272, was published on 5 November 2026. 4 vulnerabilities in the last four weeks, up from none in the four before. 1 technology has a page of its own.

## Counts

- Last 7 days: 0
- Last 30 days: 2
- Last 90 days: 4
- All time: 5 (0 critical, 0 exploited in the wild)

## About OAuthlib

Python library for implementing OAuth 1.0 and 2.0 authentication protocols.

## Latest OAuthlib vulnerabilities

- [CVE-2026-49272: OAuthLib device code grant missing validation](https://junglewise.ai/threats/cve-2026-49272-oauthlib-bearer-token-can-be-retrieved-as-long-as-client-knows-a) (high, CVSS 8.5, published 5 Nov 2026)
- [CVE-2026-118669: OAuthLib client authentication bypass in token grants](https://junglewise.ai/threats/cve-2026-118669-oauthlib-is-an-implementation-of-the-oauth-request-signing-logic) (high, CVSS 4, published 28 Oct 2026)
- [CVE-2026-49265: OAuthlib timing attack in PKCE code_verifier comparison](https://junglewise.ai/threats/cve-2026-49265-oauthlib-timing-attack-vulnerability-in-pkce-code-verifier) (medium, CVSS 6.8, published 13 Oct 2026)
- [CVE-2026-49264: oauthlib unsafe JSONP callback injection in RevocationEndpoint](https://junglewise.ai/threats/cve-2026-49264-oauthlib-unsafe-jsonp-callback-injection-in-revocationendpoint) (medium, CVSS 6.1, published 13 Oct 2026)
- [CVE-2022-36087: oauthlib denial of service in URI validation with malicious IPv6](https://junglewise.ai/threats/cve-2022-36087-oauthlib-denial-of-service-in-uri-validation-with-malicious-ipv6) (low, CVSS 3.1, published 9 Sep 2022)

## Most severe OAuthlib vulnerabilities

- [CVE-2026-49272: OAuthLib device code grant missing validation](https://junglewise.ai/threats/cve-2026-49272-oauthlib-bearer-token-can-be-retrieved-as-long-as-client-knows-a) (high, CVSS 8.5, published 5 Nov 2026)
- [CVE-2026-118669: OAuthLib client authentication bypass in token grants](https://junglewise.ai/threats/cve-2026-118669-oauthlib-is-an-implementation-of-the-oauth-request-signing-logic) (high, CVSS 4, published 28 Oct 2026)
- [CVE-2026-49265: OAuthlib timing attack in PKCE code_verifier comparison](https://junglewise.ai/threats/cve-2026-49265-oauthlib-timing-attack-vulnerability-in-pkce-code-verifier) (medium, CVSS 6.8, published 13 Oct 2026)
- [CVE-2026-49264: oauthlib unsafe JSONP callback injection in RevocationEndpoint](https://junglewise.ai/threats/cve-2026-49264-oauthlib-unsafe-jsonp-callback-injection-in-revocationendpoint) (medium, CVSS 6.1, published 13 Oct 2026)
- [CVE-2022-36087: oauthlib denial of service in URI validation with malicious IPv6](https://junglewise.ai/threats/cve-2022-36087-oauthlib-denial-of-service-in-uri-validation-with-malicious-ipv6) (low, CVSS 3.1, published 9 Sep 2022)

## Vulnerabilities per week

4 vulnerabilities in the last four weeks, up from none in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 0 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 0 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 2 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 1 | 0 | 0 |
| 2 Nov 2026 | 1 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## OAuthlib technologies

- [OAuthlib](https://junglewise.ai/threats/technologies/oauthlib-oauthlib): 4 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "OAuthlib vulnerabilities", https://junglewise.ai/threats/vendors/oauthlib, 13 November 2026.