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CVE-2026-72758— Routinator may exit on malformed ranges

Quick assessment

Affected
NLnet Labs Routinator
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Routinator 解析自治系统（AS）号段时，如果该号段的最大值小于最小值，Routinator 将无法到达最大值，从而导致内存耗尽。

CVSS 7.5 · High EPSS 0.40% · P34

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
NLnet Labs Routinator 0.15.3< * unaffected
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I. Basic Information for CVE-2026-72758

Vulnerability Information
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Vulnerability Title
Routinator may exit on malformed ranges
Source: CVE Program / CVE List V5
Vulnerability Description
When parsing an AS range in Routinator, if the maximum value of the range is smaller than the minimum value of the range, Routinator will never reach the maximum value and run out of memory.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对异常条件的处理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
NLnet Labs Routinator 0.15.3 ~ * -

II. Public POCs for CVE-2026-72758

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-72758

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Vendor Advisories for CVE-2026-72758 (1)

Same Patch Batch · NLnet Labs · 2026-10-26 · 7 CVEs total

CVE-2026-72753 8.2 HIGH Routinator incorrectly handles delta updates
CVE-2026-72756 7.5 HIGH Routinator exits on malformed rsync URIs
CVE-2026-72754 7.5 HIGH Routinator exits when parsing an incorrect or very large CRL file
CVE-2026-72752 6.5 MEDIUM Routinator exits when requesting the output repeatedly
CVE-2026-72757 5.3 MEDIUM Routinator HTTP server becomes unavailable with many unclosed connections
CVE-2026-72755 3.8 LOW Routinator stores TA certificate in cache without validation

IV. Related Vulnerabilities

Same product: Routinator
Same vendor: NLnet Labs
Same weakness: CWE-755