CVE-2026-76203

MEDIUMPre-NVD 5.15.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4% (31st percentile of EPSS-scored CVEs). 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
5.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.1Exploit: None knownExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

Incorrect Behavior Order: Validate Before Canonicalize in the report theme CSS sanitizer in maalfer Pentestify 1.2.0 through 2.3.2 allows an authenticated user to force outbound HTTP requests from other users' browsers, disclosing their IP address and User-Agent, via CSS hex escapes that reconstruct the url() function and evade the sanitizer blocklist

CVSS v3
5.1
EG Score
5.1MEDIUMmedium confidence
EG Risk
23
EG Risk 23/100CISA 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
Severity51% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

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 19, 2026

Last Modified

September 1, 2026

Advisory Details (2)

Auto-updated Aug 19, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

CVE-2026-76203 · CSS sanitizer bypass in Pentestify report themes allows forced outbound requests from users' browsers | Vulnerabilities published by Secur0

https://secur0.com/en/cna/cve-list/cve-2026-76203-css-sanitizer-bypass-pentestify-report-themes
github_commit

commit 1ed1aadadb02 (ccyl13/Pentestify)

Fix landed in ccyl13/Pentestify commit 1ed1aadadb02 — awaiting tagged release

https://github.com/ccyl13/Pentestify/commit/1ed1aadadb02e959af470aac9958462048f7f5f5

Vendor Advisories for CVE-2026-76203(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 78× 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 142 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-76203?
CVE-2026-76203 is a medium vulnerability published on August 19, 2026. Incorrect Behavior Order: Validate Before Canonicalize in the report theme CSS sanitizer in maalfer Pentestify 1.2.0 through 2.3.2 allows an authenticated user to force outbound HTTP requests from other users' browsers, disclosing their IP address and User-Agent, via CSS hex escapes that…
When was CVE-2026-76203 disclosed?
CVE-2026-76203 was first published on August 19, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76203 actively exploited?
CVE-2026-76203 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76203?
CVE-2026-76203 has a CVSS base score of 5.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-76203?
An upstream fix for CVE-2026-76203 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-76203 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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