# CVE-2026-108162: Pingvin Share X rate limit bypass via proxy header spoofing

Source: https://junglewise.ai/threats/cve-2026-108162-pingvin-share-x-before-1-22-0-contains-a-rate-limit-bypass  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-10. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-108162 · Severity: medium · CVSS 6.5 · Published 2026-10-10

Pingvin Share X is a self-hosted file sharing platform used for secure document exchange. Before version 1.22.0, an unauthenticated attacker can bypass the per-IP rate limit protection on login and password reset endpoints by spoofing proxy headers, allowing them to brute-force user passwords and TOTP codes without detection.

Technologies: [Smp46 Pingvin Share X](https://junglewise.ai/threats/technologies/pingvin-share-x). Vendors: [Smp46](https://junglewise.ai/threats/vendors/smp46).

## Quick answers

**Is CVE-2026-108162 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108162 being exploited in the wild.

**How severe is CVE-2026-108162?** Medium severity, with a CVSS score of 6.5, published 10 October 2026.

**Which products and versions are affected?** Smp46 Pingvin Share X before 1.22.0.

**Is there a fix for CVE-2026-108162?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-108162?** Check whether you run Smp46 Pingvin Share X at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The backend unconditionally trusts the X-Forwarded-For proxy header in main.ts via the "trust proxy" setting, allowing attackers to rotate spoofed client IP addresses. An attacker can send repeated authentication attempts against /api/auth/signIn, /api/auth/signIn/totp, and /api/auth/resetPassword endpoints without triggering per-IP rate limiting, enabling credential brute-force attacks and TOTP code enumeration.

## Affected products

- smp46 Pingvin Share X before 1.22.0

## Timeline

- 2026-10-10: disclosed

## References

- [https://github.com/smp46/pingvin-share-x](https://github.com/smp46/pingvin-share-x)
- [https://github.com/smp46/pingvin-share-x/blob/68ebf191fe1362592ffd5517e662f087e36c10b2/backend/src/main.ts](https://github.com/smp46/pingvin-share-x/blob/68ebf191fe1362592ffd5517e662f087e36c10b2/backend/src/main.ts)

## Related threats

- [Pingvin Share X ineffective rate limiting in authentication](https://junglewise.ai/threats/cve-2026-108163-pingvin-share-x-before-1-22-0-contains-an-ineffective-rate)
- [Pingvin Share X improper authentication in OAuth](https://junglewise.ai/threats/cve-2026-108157-pingvin-share-x-from-0-19-0-before-1-22-0-contains-an-improper)