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CVE-2026-72755— Routinator stores TA certificate in cache without validation

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.

Routinator 通过 HTTPS 获取新的 TA 证书后，会在未进行验证的情况下将其存入缓存，这可能导致已知的有效 TA 证书被覆盖，即使验证失败也会发生这种情况。

CVSS 3.8 · Low EPSS 0.18% · P8

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-2026-72755

Vulnerability Information
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Vulnerability Title
Routinator stores TA certificate in cache without validation
Source: CVE Program / CVE List V5
Vulnerability Description
Routinator stores a newly-retrieved TA certificate via HTTPS in cache without validation, potentially overwriting a known good TA certificate even if validation fails.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
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-2026-72755

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-72755

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Vendor Pages for CVE-2026-72755 (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-2026-72758 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

IV. Related Vulnerabilities

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