CVE-2026-54452

MEDIUMPre-NVD 6.36.3
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (42nd percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
6.3EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
6.3MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

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 (value × EchelonGraph’s weight)
Severity63% × 45%
The EG Score, 6.3 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 15, 2026

Last Modified

September 30, 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 pull request 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 advisoryMentions a patch (unverified)

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 rangeFix by version rangeDependents
github.com/doyensec/safeurl—
  • every version up to 0.2.4: fixed in 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 / 39× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  3. 2026-10-12 15:56 UTCEG score recompute
  4. 2026-10-11 19:39 UTCEG score recompute
  5. 2026-10-11 16:54 UTCEG score recompute
  6. 2026-10-11 14:18 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  11. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  15. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  16. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-09-30 18:11 UTCEG score recompute
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  21. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  22. 2026-09-28 08:40 UTCEG score recompute
  23. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  24. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 41st percentile
  25. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 41st percentile
Show 18 more
  1. 2026-09-24 08:45 UTCEG score recompute
  2. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  3. 2026-09-23 03:14 UTCEG score recompute
  4. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  5. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  6. 2026-09-18 04:42 UTCEG score recompute
  7. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  8. 2026-09-16 17:11 UTCEG score recompute
  9. 2026-09-16 15:33 UTCEG score recompute
  10. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  11. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 32nd percentile
  12. 2026-09-14 18:08 UTCEG score recompute
  13. 2026-09-14 16:20 UTCEG score recomputeFirst assessed: 6.3 MEDIUM
  14. 2026-09-14 16:19 UTCMITRE cvelistV5CVSS v3 → 6.3 · CVSS v4 → 6.3
  15. 2026-08-01 13:45 UTCEG score recompute
  16. 2026-07-26 11:28 UTCEG score recompute
  17. 2026-07-23 03:19 UTCEG score recompute
  18. 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-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-54452 published?
The CVE record for CVE-2026-54452 was published on July 15, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 30, 2026; the record at its source may have been updated since.
Is CVE-2026-54452 actively exploited?
CVE-2026-54452 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-54452?
CVE-2026-54452 has a CVSS base score of 6.3 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-54452?
A fix for CVE-2026-54452 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-54452 are linked in the Vendor Advisories panel on this page.

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