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TI-2026-80092 Aliases CVE-2026-115971

Denial of service in Travisun Opptrix webhook preParsing handler

Priority HIGH 70CWE-404Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-404.

Summary

A resource release flaw in the preParsing handler of the /api/channels/webhook/ endpoint, which uses Buffer.concat, lets a remote attacker without privileges cause a denial of service (CWE-404) in Travisun Opptrix from 0.4.0. A public exploit is linked in the references. The vulnerability affects only products that the maintainer no longer supports.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

A vulnerability was found in Travisun Opptrix 0.4.0. Affected is the function Buffer.concat of the file /api/channels/webhook/ of the component preParsing handler. Performing a manipulation results in denial of service. The attack can be initiated remotely. The exploit has been made public and could be used. The project has been completely taken offline and deprecated. The project maintainer explains: "The mentioned security risk was a design flaw that manifested primarily in local environments during earlier stages of version development. We previously addressed and resolved this specific risk; however, because the project was restricted to a small learning scope and the main versions were intended to run exclusively on localhost, the security fix was only pushed directly to our GitHub repository before it went private." This vulnerability only affects products that are no longer supported by the maintainer.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00372 31st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

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
TravisunOpptrix0.4.0—No fix listedCNA
  • Opptrix VendorTravisun Affected 0.4.0 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:travisun:opptrix:*:*:*:*:*:*:*:*——Travisun
  • cpe:2.3:a:travisun:opptrix:*:*:*:*:*:*:*:* Versions — — ·Travisun

Remediation

The sources list no fixed version for Travisun Opptrix. The maintainer has taken the project offline and deprecated it.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-24 Threatist record created from CVE-2026-115971
  2. 2026-10-25 Priority changed: MEDIUM → LOW
  3. 2026-10-26 CISA SSVC decision points changed
  4. 2026-10-26 Priority changed: LOW → HIGH

References

Exploit 1

  • TI-2026-80091 Code injection in Travisun Opptrix import endpoint CVSS 4.0MEDIUM 6.9
  • TI-2026-80090 Command injection in Travisun Opptrix Schedule API setup endpoint CVSS 4.0MEDIUM 6.9

Sources

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