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TI-2026-70530 Aliases CVE-2026-108162GHSA-3chq-cx7h-2cfx

Rate limit bypass in Pingvin Share X via spoofed X-Forwarded-For

Priority LOW 38CWE-348Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Pingvin Share X from 0 before 1.22.0 trusts proxy headers unconditionally in backend/src/main.ts, so its per-IP rate limiting can be bypassed. An unauthenticated remote attacker can rotate spoofed X-Forwarded-For values against the sign-in, TOTP and password reset endpoints to brute-force passwords and TOTP codes. The attacker can also forge the client IP addresses recorded in logs. This weakness is classified as CWE-348.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00183 7th percentileScored 2026-11-07
Fix Fixed pingvin-share-x (smp46): 1.22.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
smp46pingvin-share-xbefore 1.22.01.22.0Patch availableCNA
  • pingvin-share-x Vendorsmp46 Affected before 1.22.0 Fixed in 1.22.0 Patch available CNA

Remediation

Upgrade smp46 pingvin-share-x to version 1.22.0 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA pingvin-share-x (smp46) Fixed in 1.22.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    smp46 pingvin-share-x — GitHub Security Advisory (GHSA-7gx2-g6x2-7mjg)

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-70531 Ineffective authentication rate limiting in Pingvin Share XPriority LOW 36
    Show all 2 records → Advisory →

Timeline

  1. 2026-10-11 Threatist record created from CVE-2026-108162
  2. 2026-10-11 Alias added: GHSA-3chq-cx7h-2cfx
  3. 2026-10-11 Priority changed: MEDIUM → LOW
  4. 2026-10-13 CISA SSVC decision points changed

References

Patch 1

Advisory 1

Other 3

  • TI-2026-70100 Account takeover in Pingvin Share X via OAuth email linking CVSS 4.0CRITICAL 9.2
  • TI-2026-32175 Pingvin Share X: TOTP Authentication Bypass via Password-only Login CVSS 3.1CRITICAL 9.1
  • TI-2026-36622 TOTP enrollment hijack: password gate skipped due to unawaited promise CVSS 3.1HIGH 8.8
  • TI-2026-70531 Ineffective authentication rate limiting in Pingvin Share X CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences