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Back to active CVEs
Medium · CVSS 5.3CVE-2026-72757

Routinator HTTP server becomes unavailable with many unclosed connectionsCVE-2026-72757

Answer in brief

CVE-2026-72757 records a Medium severity (CVSS 5.3) vulnerability in Routinator HTTP server becomes unavailable with many unclosed connections. The current sources do not mark it as known exploited. Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
Not mapped
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

Affected software not mapped in the current feed; confirm the named product and version against your inventory.

Recommended response

  1. 1Confirm exposure. Identify whether the named product or interface exists in your inventory, then review the linked upstream references for affected versions and vendor guidance.

Evidence timeline and material changes

  1. Published upstream

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 26, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 26, 2026

Sources and claim methodology

  • Source referencenlnetlabs.nl
Upstream source description

Routinator runs out of open connections on the HTTP server when many connections are opened but never closed, leaving the HTTP server unavailable. This condition can be triggered maliciously by an attacker by opening a large number of connections to the HTTP server. This only affects users that make their HTTP or RTR server available to untrusted networks.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Routinator exits when requesting the output repeatedlyAlso CWE-755
  • Routinator incorrectly handles delta updatesAlso CWE-755
  • Routinator exits when parsing an incorrect or very large CRL fileAlso CWE-755
  • Routinator stores TA certificate in cache without validationAlso CWE-755
  • Routinator exits on malformed rsync URIsAlso CWE-755
  • Routinator may exit on malformed rangesAlso CWE-755

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-755
Source
CVE List V5
Source checked
Oct 26, 2026
References
1 linked source
Open source record