What’s Vulnerable › Vulnerabilities

CVE-2026-108162: Pingvin Share X before 1.22.0 Rate Limit Bypass via Spoofed X-Forwarded-For

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-10 · updated 2026-10-16
• Weakness: CWE-348

Description

Pingvin Share X before 1.22.0 contains a rate limit bypass vulnerability that allows unauthenticated remote attackers to evade per-IP throttling because backend/src/main.ts unconditionally trusts proxy headers. Attackers can rotate spoofed X-Forwarded-For values against /api/auth/signIn, /api/auth/signIn/totp, and /api/auth/resetPassword to brute-force passwords and TOTP codes and forge logged client IP addresses.

Affected products

• smp46 pingvin-share-x: before 1.22.0 — fixed in 1.22.0

How to fix

Upgrade to a fixed version: smp46 pingvin-share-x 1.22.0. Check the vendor advisory for mitigations.

References

• https://github.com/smp46/pingvin-share-x
• https://github.com/smp46/pingvin-share-x/blob/68ebf191fe1362592ffd5517e662f087e36c10b2/backend/src/main.ts#L57
• https://github.com/smp46/pingvin-share-x/commit/25e9cee7fb1c155300b5663fc5fedeea32d20954
• https://github.com/smp46/pingvin-share-x/releases/tag/v1.22.0
• https://github.com/smp46/pingvin-share-x/security/advisories/GHSA-7gx2-g6x2-7mjg
• https://www.vulncheck.com/advisories/pingvin-share-x-before-1.22.0-rate-limit-bypass-via-spoofed-x-forwarded-for

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