CVE-2026-54452

MEDIUMPre-NVD 6.36.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this week
6.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

safeurl is a server-side request forgery protection library. Prior to 0.2.4, the privateNetworks list in ip.go omits the IPv6 ranges 64:ff9b:1::/48, 5f00::/16, 3fff::/20, and 100:0:0:1::/64. When an application enables IPv6 with EnableIPv6(true), an attacker-controlled destination in one of these ranges is not recognized as non-public and can pass the SSRF destination check, potentially allowing access to resources hosted within the omitted ranges. IPv6 is disabled by default, and configurations that retain EnableIPv6(false) are not exposed to this bypass. This issue is fixed in version 0.2.4.

CVSS v3
6.3
EG Score
6.3(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity63% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

July 15, 2026

Last Modified

September 16, 2026

Advisory Details (4)

Auto-updated Sep 14, 2026
Patch available. Sources: github_release, github, github_pr, github_commit.
github_release Patch Available

Release 0.2.4

Patch available: doyensec/safeurl v0.2.4

https://github.com/doyensec/safeurl/releases/tag/v0.2.4
github_commit Patch Available

commit d8f1021ea535 (doyensec/safeurl)

Patch available: doyensec/safeurl v0.2.4 (contains commit d8f1021ea535)

https://github.com/doyensec/safeurl/commit/d8f1021ea535b276f92999f0ec865da40e467016
github_pr Patch Available

Updated Private Network Ranges Blocklist

Patch available: doyensec/safeurl v0.2.4 (PR #12 merged 2026-06-04)

https://github.com/doyensec/safeurl/pull/12
github Patch Available

Missing IPv6 CIDR Ranges in Blocklist · Advisory · doyensec/safeurl · GitHub

https://github.com/doyensec/safeurl/security/advisories/GHSA-xgch-x3mx-cm3c

Vendor Advisories for CVE-2026-54452(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Go(1)
PackageVulnerable rangeFixed inDependents
github.com/doyensec/safeurl—0.2.4—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 11× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 04:42 UTCEG score recompute
  4. 2026-09-17 19:31 UTCEPSS rescore
  5. 2026-09-16 17:11 UTCEG score recompute
  6. 2026-09-16 15:33 UTCEG score recompute
  7. 2026-09-16 14:08 UTCEPSS rescore
  8. 2026-09-16 05:15 UTCEPSS rescore
  9. 2026-09-14 18:08 UTCEG score recompute
  10. 2026-09-14 16:20 UTCEG score recompute▲ 6.30
  11. 2026-09-14 16:19 UTCMITRE cvelistV5CVSS v3 → 6.3 · CVSS v4 → 6.3
  12. 2026-08-01 13:45 UTCEG score recompute
  13. 2026-07-26 11:28 UTCEG score recompute
  14. 2026-07-23 03:19 UTCEG score recompute
  15. 2026-07-15 22:19 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-54452?
CVE-2026-54452 is a medium vulnerability published on July 15, 2026. safeurl is a server-side request forgery protection library. Prior to 0.2.4, the privateNetworks list in ip.go omits the IPv6 ranges 64:ff9b:1::/48, 5f00::/16, 3fff::/20, and 100:0:0:1::/64. When an application enables IPv6 with EnableIPv6(true), an attacker-controlled destination in one of these…
When was CVE-2026-54452 disclosed?
CVE-2026-54452 was first published in the National Vulnerability Database on July 15, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54452 actively exploited?
CVE-2026-54452 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 67.0% of all scored CVEs.
What is the CVSS score of CVE-2026-54452?
CVE-2026-54452 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-54452?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54452, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-54452

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