CVE-2026-19988

MEDIUMPre-NVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory (severity: LOW) published 2026-08-17. a secondary CVSS source baseline 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: Elevated riskExposed: 0

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

A vulnerability was detected in Alaev SEO Tools Extension up to 1.0.10 on Chrome. This impacts the function addDiv of the file src/popup.html of the component Popup UI. Performing a manipulation results in basic cross site scripting. The attack can be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity43% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
19%
KEV
Not listed

Published

August 17, 2026

Last Modified

August 20, 2026

Advisory Details (1)

Auto-updated Aug 17, 2026
🔬 Proof of concept available. No patch confirmed yet.
generic🟡 PoC Available

chrome_extensions/Alaev & Co Alaev SEO Tools 1.0.10 allows extension popup UI injection through unsanitized page SEO fields at main · xryj920/chrome_extensions · GitHub

https://github.com/xryj920/chrome_extensions/blob/main/Alaev%20%26%20Co%20Alaev%20SEO%20Tools%201.0.10%20allows%20extension%20popup%20UI%20injection%20through%20unsanitized%20page%20SEO%20fields

Vendor Advisories for CVE-2026-19988(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 17× 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.

  1. 2026-09-19 05:01 UTCEG score recompute
  2. 2026-09-19 05:01 UTCGHSA enrichment
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-18 04:59 UTCEG score recompute
  5. 2026-09-18 04:59 UTCGHSA enrichment
  6. 2026-09-17 04:57 UTCEG score recompute
  7. 2026-09-17 04:57 UTCGHSA enrichment
  8. 2026-09-16 14:07 UTCEPSS rescore
  9. 2026-09-16 05:14 UTCEPSS rescore
  10. 2026-09-16 04:55 UTCGHSA enrichment
  11. 2026-09-15 04:12 UTCEG score recompute
  12. 2026-09-15 04:12 UTCGHSA enrichment
  13. 2026-09-14 03:56 UTCEG score recompute
  14. 2026-09-14 03:56 UTCGHSA enrichment
  15. 2026-09-13 16:46 UTCEPSS rescore
  16. 2026-09-13 03:55 UTCEG score recompute
  17. 2026-09-13 03:55 UTCGHSA enrichment
  18. 2026-09-12 15:00 UTCEPSS rescore
  19. 2026-09-12 03:52 UTCEG score recompute
  20. 2026-09-12 03:52 UTCGHSA enrichment
  21. 2026-09-11 14:52 UTCEPSS rescore
  22. 2026-09-11 03:49 UTCEG score recompute
  23. 2026-09-11 03:49 UTCGHSA enrichment
  24. 2026-09-10 09:34 UTCEPSS rescore
  25. 2026-09-10 03:47 UTCGHSA enrichment
Show 72 more
  1. 2026-09-09 03:44 UTCEG score recompute
  2. 2026-09-09 03:44 UTCGHSA enrichment
  3. 2026-09-08 22:00 UTCEPSS rescore
  4. 2026-09-07 17:50 UTCEG score recompute
  5. 2026-09-07 17:50 UTCGHSA enrichment
  6. 2026-09-07 16:01 UTCEPSS rescore
  7. 2026-09-06 17:48 UTCEG score recompute
  8. 2026-09-06 17:48 UTCGHSA enrichment
  9. 2026-09-06 13:47 UTCEPSS rescore
  10. 2026-09-05 17:45 UTCEG score recompute
  11. 2026-09-05 17:45 UTCGHSA enrichment
  12. 2026-09-04 17:32 UTCEG score recompute
  13. 2026-09-04 17:32 UTCGHSA enrichment
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-03 17:18 UTCGHSA enrichment
  16. 2026-09-02 17:12 UTCEG score recompute
  17. 2026-09-02 17:12 UTCGHSA enrichment
  18. 2026-09-02 14:11 UTCEPSS rescore
  19. 2026-09-01 15:16 UTCEG score recompute
  20. 2026-09-01 15:16 UTCGHSA enrichment
  21. 2026-09-01 13:53 UTCEPSS rescore
  22. 2026-09-01 04:39 UTCEPSS rescore
  23. 2026-08-31 15:14 UTCEG score recompute
  24. 2026-08-31 15:14 UTCGHSA enrichment
  25. 2026-08-30 19:17 UTCEPSS rescore
  26. 2026-08-30 14:42 UTCEG score recompute
  27. 2026-08-30 14:42 UTCGHSA enrichment
  28. 2026-08-30 01:22 UTCEPSS rescore
  29. 2026-08-29 14:40 UTCEG score recompute
  30. 2026-08-29 14:40 UTCGHSA enrichment
  31. 2026-08-28 21:41 UTCEPSS rescore
  32. 2026-08-28 13:26 UTCEG score recompute
  33. 2026-08-28 13:26 UTCGHSA enrichment
  34. 2026-08-27 14:25 UTCEPSS rescore
  35. 2026-08-27 13:20 UTCEG score recompute
  36. 2026-08-27 13:20 UTCGHSA enrichment
  37. 2026-08-26 14:46 UTCEPSS rescore
  38. 2026-08-26 13:17 UTCEG score recompute
  39. 2026-08-26 13:17 UTCGHSA enrichment
  40. 2026-08-25 13:48 UTCEPSS rescore
  41. 2026-08-25 13:14 UTCEG score recompute
  42. 2026-08-25 13:14 UTCGHSA enrichment
  43. 2026-08-24 13:12 UTCEG score recompute
  44. 2026-08-24 13:12 UTCGHSA enrichment
  45. 2026-08-23 13:10 UTCEG score recompute
  46. 2026-08-23 13:10 UTCGHSA enrichment
  47. 2026-08-23 00:19 UTCEPSS rescore
  48. 2026-08-22 13:04 UTCEG score recompute
  49. 2026-08-22 13:04 UTCGHSA enrichment
  50. 2026-08-21 23:49 UTCEPSS rescore
  51. 2026-08-21 13:02 UTCEG score recompute
  52. 2026-08-21 13:02 UTCGHSA enrichment
  53. 2026-08-20 22:55 UTCEPSS rescore
  54. 2026-08-20 13:00 UTCEG score recompute
  55. 2026-08-20 13:00 UTCGHSA enrichment
  56. 2026-08-19 17:03 UTCEPSS rescore
  57. 2026-08-19 15:20 UTCEG score recompute
  58. 2026-08-19 15:20 UTCGHSA enrichment
  59. 2026-08-18 15:18 UTCEG score recompute
  60. 2026-08-18 15:18 UTCGHSA enrichment
  61. 2026-08-18 15:18 UTCNVD updateCVSS v4 → 2.1
  62. 2026-08-18 14:51 UTCEG score recompute
  63. 2026-08-18 14:51 UTCGHSA enrichment
  64. 2026-08-18 14:29 UTCMITRE cvelistV5CVSS v4 → 5.3
  65. 2026-08-18 13:48 UTCEPSS rescore
  66. 2026-08-18 06:21 UTCEG score recompute
  67. 2026-08-18 06:21 UTCGHSA enrichment
  68. 2026-08-17 13:47 UTCEPSS rescore
  69. 2026-08-17 06:19 UTCEG score recompute
  70. 2026-08-17 06:18 UTCNVD updateCVSS v4 → 2.1
  71. 2026-08-17 05:39 UTCEG score recompute
  72. 2026-08-17 05:39 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-19988?
CVE-2026-19988 is a medium vulnerability published on August 17, 2026. A vulnerability was detected in Alaev SEO Tools Extension up to 1.0.10 on Chrome. This impacts the function addDiv of the file src/popup.html of the component Popup UI. Performing a manipulation results in basic cross site scripting. The attack can be initiated remotely. The exploit is now public…
When was CVE-2026-19988 disclosed?
CVE-2026-19988 was first published in the National Vulnerability Database on August 17, 2026, with the most recent update on August 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-19988 actively exploited?
CVE-2026-19988 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 80.7% of all scored CVEs.
What is the CVSS score of CVE-2026-19988?
CVE-2026-19988 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2026-19988?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-19988, 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

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