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CVE-2026-72753— Routinator incorrectly handles delta updates

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.

当 Routinator 遇到 RRDP 通知文件中存在增量条目（delta entries）缺失的情况时，仍会接受并解析该文件，这可能导致数据丢失。如果增量条目数量过多，Routinator 还可能耗尽内存。

CVSS 8.2 · High EPSS 0.40% · P34

Affected Version Matrix 1

VendorProduct Version RangeStatus
NLnet Labs Routinator 0.15.3< * unaffected
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I. Basic Information for CVE-2026-72753

Vulnerability Information
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Vulnerability Title
Routinator incorrectly handles delta updates
Source: CVE Program / CVE List V5
Vulnerability Description
When Routinator encounters an RRDP notification file with gaps in the delta entries, it is still accepted and parsed, potentially leading to missing data. If it encounters too many delta entries it may 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:L/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-2026-72753

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-72753

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Vendor Pages for CVE-2026-72753 (1)

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

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-2026-72758 7.5 HIGH Routinator may exit on malformed ranges
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