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TI-2026-80511 Aliases CVE-2026-72756GHSA-m856-4mhh-5mgh

Routinator exits on malformed rsync URIs

Priority LOW 39CWE-755Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Routinator, an RPKI validator from NLnet Labs, exits when an rsync URI for a file obtained over RRDP contains a path that cannot be stored on disk. Such paths include file names that are too long and folder names that overlap with existing file names. The flaw is classified as CWE-755 (improper handling of exceptional conditions). A remote attacker with no privileges and no user interaction can crash the service, as the CVSS vector indicates a high availability impact.

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

Description from the CNA

Routinator exits when an rsync URI for a file obtained over RRDP contains a path that cannot be stored on disk, such as too long file names, and folder names that overlap with existing file names.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00397 34th percentileScored 2026-11-07
Fix Fixed Routinator (NLnet Labs): 0.15.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
NLnet LabsRoutinator—0.15.3Patch availableCNA
  • Routinator VendorNLnet Labs Affected — Fixed in 0.15.3 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:nlnetlabs:routinator:*:*:*:*:*:*:*:*——NLNETLABS
  • cpe:2.3:a:nlnetlabs:routinator:*:*:*:*:*:*:*:* Versions — — ·NLNETLABS

Remediation

Upgrade NLnet Labs Routinator to version 0.15.3 or later.

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

  • Fix · CNA Routinator (NLnet Labs) Fixed in 0.15.3

Fixed in the same release

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

  • Advisory ·

    NLnet Labs Routinator — nlnetlabs.nl/downloads/routinator/CVE-2026-72756.txt

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-80513 Malformed AS range makes Routinator run out of memoryPriority LOW 39
    • TI-2026-80512 Routinator HTTP server becomes unavailable with many unclosed connectionsPriority LOW 30
    Show all 3 records → Advisory →

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-72756
  2. 2026-10-26 CISA SSVC decision points changed
  3. 2026-10-26 Priority changed: MEDIUM → LOW
  4. 2026-10-27 Alias added: GHSA-m856-4mhh-5mgh

References

Advisory 1

  • TI-2026-25690 Possible arbitrary code execution during DNSSEC validation CVSS 4.0CRITICAL 9.1
  • TI-2026-56302 Heap buffer overflow and possible Remote Code Execution when digesting DNSKEY CVSS 4.0CRITICAL 9.1
  • TI-2026-31146 Crash during DNSSEC validation of malicious content CVSS 4.0HIGH 8.7
  • TI-2026-31135 Heap overflow with multiple NSID, COOKIE, PADDING EDNS options CVSS 4.0HIGH 8.7
  • TI-2026-36436 Routinator crashes on specifically crafted RRDP XML files CVSS 4.0HIGH 8.7
  • TI-2026-36433 Routinator exits when accepting an incoming HTTP or RTR connection fails CVSS 4.0HIGH 8.7
See all 96 →

Sources

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