# Bubka vulnerabilities

Source: https://junglewise.ai/threats/vendors/bubka  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 9 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/vendors/bubka.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 5 vulnerabilities in Bubka: 5 in the last 7 days and 5 in the last 90 days, 2 of them critical and 0 exploited in the wild. The most recent, CVE-2026-63441, was published on 6 November 2026. 5 vulnerabilities in the last four weeks, up from none in the four before. 2 critical against 0. 1 technology has a page of its own.

## Counts

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

## About Bubka

Software organization or developer known for 2FAuth two-factor authentication web application.

## Latest Bubka vulnerabilities

- [CVE-2026-63441: 2FAuth SSRF via unrecognized IPv6 NAT64 prefixes](https://junglewise.ai/threats/cve-2026-63441-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (info, published 6 Nov 2026)
- [CVE-2026-63440: 2FAuth SSRF via DNS rebinding in otpauth image fetch](https://junglewise.ai/threats/cve-2026-63440-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (medium, CVSS 5.9, published 6 Nov 2026)
- [CVE-2026-63439: 2FAuth reverse proxy authentication bypass](https://junglewise.ai/threats/cve-2026-63439-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (critical, CVSS 9.8, published 6 Nov 2026)
- [CVE-2026-63438: 2FAuth reverse-proxy authentication bypass leading to account creation](https://junglewise.ai/threats/cve-2026-63438-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (critical, CVSS 9.8, published 6 Nov 2026)
- [CVE-2026-63437: 2FAuth missing authorization on share recipients endpoint](https://junglewise.ai/threats/cve-2026-63437-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (medium, CVSS 6.5, published 6 Nov 2026)

## Most severe Bubka vulnerabilities

- [CVE-2026-63439: 2FAuth reverse proxy authentication bypass](https://junglewise.ai/threats/cve-2026-63439-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (critical, CVSS 9.8, published 6 Nov 2026)
- [CVE-2026-63438: 2FAuth reverse-proxy authentication bypass leading to account creation](https://junglewise.ai/threats/cve-2026-63438-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (critical, CVSS 9.8, published 6 Nov 2026)
- [CVE-2026-63437: 2FAuth missing authorization on share recipients endpoint](https://junglewise.ai/threats/cve-2026-63437-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (medium, CVSS 6.5, published 6 Nov 2026)
- [CVE-2026-63440: 2FAuth SSRF via DNS rebinding in otpauth image fetch](https://junglewise.ai/threats/cve-2026-63440-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (medium, CVSS 5.9, published 6 Nov 2026)
- [CVE-2026-63441: 2FAuth SSRF via unrecognized IPv6 NAT64 prefixes](https://junglewise.ai/threats/cve-2026-63441-2fauth-is-a-web-app-to-manage-two-factor-authentication-2fa) (info, published 6 Nov 2026)

## Vulnerabilities per week

5 vulnerabilities in the last four weeks, up from none in the four before. 2 critical against 0.

| 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 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 5 | 2 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Bubka technologies

- [Bubka 2FAuth](https://junglewise.ai/threats/technologies/2fauth): 5 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, "Bubka vulnerabilities", https://junglewise.ai/threats/vendors/bubka, 9 November 2026.