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TI-2026-61681 Aliases CVE-2026-90774GHSA-jcjc-q6x9-fww9

rustypaste before 0.18.1 Path Traversal via filename header

Priority HIGH 77CWE-22Published · Updated

Key facts

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

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

Summary

rustypaste before 0.18.1 validates the destination path before applying the optional custom filename HTTP header, allowing attackers to bypass directory-escape checks. Attackers can supply path traversal sequences in the filename header to write files outside the configured upload directory to arbitrary locations.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01358 71st percentileScored 2026-11-07
Fix Fixed rustypaste (orhun): 0.18.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
orhunrustypastebefore 0.18.10.18.1Patch availableCNA
  • rustypaste Vendororhun Affected before 0.18.1 Fixed in 0.18.1 Patch available CNA

Remediation

  • Fix · CNA rustypaste (orhun) Fixed in 0.18.1

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-90774
  2. 2026-10-03 Alias added: GHSA-jcjc-q6x9-fww9
  3. 2026-10-23 EPSS moved to the 50th–90th percentile

References

Patch 1

Other 3

Sources

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