CVE-2026-18487

MEDIUMPre-NVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

Score 5.4 from GitHub Security Advisory published 2026-08-07. A secondary CVSS source baseline 5.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.4Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A flaw was found in Epiphany. An issue in how the browser reads web addresses allows attackers to fake the domain name shown in the address bar. If a user clicks a specially crafted link containing a colon (for example, https://trusted.com:[email protected]/), the address bar and security menus will display the safe website (trusted.com) but it will actually load the attacker website (attacker.com) on the screen. This allows attackers to create convincing phishing pages to trick users into trusting a malicious site.

CVSS v3
5.4
EG Score
5.4MEDIUMmedium confidence
EG Risk
24
EG Risk 24/100CISA SSVC

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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
25th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 6, 2026

Last Modified

August 28, 2026

Advisory Details (4)

Auto-updated Aug 6, 2026
Patch available. Sources: redhat.
generic

(CVE-2026-18487) Address Bar / Host Spoofing via userinfo in ephy_uri_get_decoded_host (#2897) · Issues · GNOME / Epiphany · GitLab

https://gitlab.gnome.org/GNOME/epiphany/-/work_items/2897
generic

Client Challenge

https://gitlab.gnome.org/GNOME/epiphany/-/commit/0dde1d369458ac5c44b74b5ad3c433f825f6f8af
redhat

2509570 – (CVE-2026-18487) CVE-2026-18487 epiphany: address bar / host spoofing via userinfo in ephy_uri_get_decoded_host()

https://bugzilla.redhat.com/show_bug.cgi?id=2509570
redhatMentions a patch (unverified)

CVE-2026-18487 - Red Hat Customer Portal

Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a

https://access.redhat.com/security/cve/CVE-2026-18487

Vendor Advisories for CVE-2026-18487(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
epiphany-browser3.38.2-1 ... 50.4-2 (75 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
epiphany-browser43.1-1 ... 51~rc-1 (46 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
epiphany-browser48.3-2 ... 51~rc-1 (16 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
epiphany-browser48.3-2 ... 50.4-2 (13 versions)
  • every version up to 51~rc-1: fixed in 51~rc-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 63× 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.

Showing the most recent 100 of 156 total refreshes for this CVE.

  1. 2026-10-10 19:59 UTCEPSS rescore
  2. 2026-10-09 20:06 UTCEPSS rescore
  3. 2026-10-08 17:11 UTCEPSS rescore
  4. 2026-10-07 23:47 UTCEPSS rescore
  5. 2026-10-06 23:24 UTCEG score recompute
  6. 2026-10-06 23:24 UTCGHSA enrichment
  7. 2026-10-06 15:17 UTCEPSS rescore
  8. 2026-10-05 17:42 UTCEPSS rescore
  9. 2026-10-05 08:26 UTCEG score recompute
  10. 2026-10-05 08:26 UTCGHSA enrichment
  11. 2026-10-04 23:21 UTCEPSS rescore
  12. 2026-10-04 05:50 UTCEG score recompute
  13. 2026-10-04 05:50 UTCGHSA enrichment
  14. 2026-10-03 14:25 UTCEPSS rescore
  15. 2026-10-02 09:40 UTCEG score recompute
  16. 2026-10-02 09:40 UTCGHSA enrichment
  17. 2026-10-01 19:49 UTCEPSS rescore
  18. 2026-10-01 01:44 UTCEG score recompute
  19. 2026-10-01 01:44 UTCGHSA enrichment
  20. 2026-09-30 15:02 UTCEPSS rescore
  21. 2026-09-29 15:20 UTCEPSS rescore
  22. 2026-09-29 05:54 UTCEG score recompute
  23. 2026-09-29 05:54 UTCGHSA enrichment
  24. 2026-09-28 13:51 UTCEPSS rescore
  25. 2026-09-27 17:29 UTCEG score recompute
Show 75 more
  1. 2026-09-27 17:29 UTCGHSA enrichment
  2. 2026-09-27 13:47 UTCEPSS rescore
  3. 2026-09-26 15:58 UTCEPSS rescore
  4. 2026-09-25 04:22 UTCEG score recompute
  5. 2026-09-25 04:22 UTCGHSA enrichment
  6. 2026-09-23 13:54 UTCEG score recompute
  7. 2026-09-23 13:54 UTCGHSA enrichment
  8. 2026-09-22 12:53 UTCEG score recompute
  9. 2026-09-22 12:53 UTCGHSA enrichment
  10. 2026-09-21 12:49 UTCEG score recompute
  11. 2026-09-21 12:49 UTCGHSA enrichment
  12. 2026-09-20 10:57 UTCEG score recompute
  13. 2026-09-20 10:57 UTCGHSA enrichment
  14. 2026-09-19 07:29 UTCEG score recompute
  15. 2026-09-19 07:29 UTCGHSA enrichment
  16. 2026-09-18 19:27 UTCEPSS rescore
  17. 2026-09-18 06:44 UTCEG score recompute
  18. 2026-09-18 06:44 UTCGHSA enrichment
  19. 2026-09-17 06:58 UTCEG score recompute
  20. 2026-09-17 06:58 UTCGHSA enrichment
  21. 2026-09-16 14:07 UTCEPSS rescore
  22. 2026-09-16 06:32 UTCEG score recompute
  23. 2026-09-16 06:31 UTCGHSA enrichment
  24. 2026-09-16 05:14 UTCEPSS rescore
  25. 2026-09-15 06:45 UTCEG score recompute
  26. 2026-09-15 06:45 UTCGHSA enrichment
  27. 2026-09-14 05:51 UTCEG score recompute
  28. 2026-09-14 05:51 UTCGHSA enrichment
  29. 2026-09-13 16:46 UTCEPSS rescore
  30. 2026-09-13 06:05 UTCEG score recompute
  31. 2026-09-13 06:05 UTCGHSA enrichment
  32. 2026-09-12 15:00 UTCEPSS rescore
  33. 2026-09-12 06:19 UTCEG score recompute
  34. 2026-09-12 06:19 UTCGHSA enrichment
  35. 2026-09-11 14:52 UTCEPSS rescore
  36. 2026-09-11 09:36 UTCEPSS rescore
  37. 2026-09-11 06:20 UTCEG score recompute
  38. 2026-09-11 06:20 UTCGHSA enrichment
  39. 2026-09-10 09:34 UTCEPSS rescore
  40. 2026-09-10 06:34 UTCGHSA enrichment
  41. 2026-09-09 06:08 UTCEG score recompute
  42. 2026-09-09 06:08 UTCGHSA enrichment
  43. 2026-09-08 22:00 UTCEPSS rescore
  44. 2026-09-07 17:56 UTCEG score recompute
  45. 2026-09-07 17:56 UTCGHSA enrichment
  46. 2026-09-06 13:47 UTCEPSS rescore
  47. 2026-09-06 08:44 UTCEG score recompute
  48. 2026-09-06 08:44 UTCGHSA enrichment
  49. 2026-09-05 08:58 UTCEG score recompute
  50. 2026-09-05 08:58 UTCGHSA enrichment
  51. 2026-09-04 09:12 UTCEG score recompute
  52. 2026-09-04 09:12 UTCGHSA enrichment
  53. 2026-09-04 05:06 UTCEPSS rescore
  54. 2026-09-03 06:15 UTCEG score recompute
  55. 2026-09-03 06:15 UTCGHSA enrichment
  56. 2026-09-02 14:11 UTCEPSS rescore
  57. 2026-09-01 22:21 UTCEG score recompute
  58. 2026-09-01 22:21 UTCGHSA enrichment
  59. 2026-09-01 13:53 UTCEPSS rescore
  60. 2026-09-01 04:39 UTCEPSS rescore
  61. 2026-08-31 22:35 UTCEG score recompute
  62. 2026-08-31 22:35 UTCGHSA enrichment
  63. 2026-08-30 19:17 UTCEPSS rescore
  64. 2026-08-30 15:53 UTCEG score recompute
  65. 2026-08-30 15:53 UTCGHSA enrichment
  66. 2026-08-30 01:22 UTCEPSS rescore
  67. 2026-08-29 16:06 UTCEG score recompute
  68. 2026-08-29 16:06 UTCGHSA enrichment
  69. 2026-08-28 21:41 UTCEPSS rescore
  70. 2026-08-28 15:58 UTCGHSA enrichment
  71. 2026-08-28 13:45 UTCEG score recompute
  72. 2026-08-28 13:45 UTCGHSA enrichment
  73. 2026-08-27 14:25 UTCEPSS rescore
  74. 2026-08-27 13:59 UTCEG score recompute
  75. 2026-08-27 13:59 UTCGHSA enrichment

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Frequently asked(5)

What is CVE-2026-18487?
CVE-2026-18487 is a medium vulnerability published on August 6, 2026. A flaw was found in Epiphany. An issue in how the browser reads web addresses allows attackers to fake the domain name shown in the address bar. If a user clicks a specially crafted link containing a colon (for example, https://trusted.com:[email protected]/), the address bar and security menus will…
When was CVE-2026-18487 disclosed?
CVE-2026-18487 was first published on August 6, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-18487 actively exploited?
CVE-2026-18487 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-18487?
CVE-2026-18487 has a CVSS base score of 5.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-18487?
A fix for CVE-2026-18487 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-18487 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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