CVE-2026-9496

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-26. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

Versions of the package pacote from 11.2.7 and before 21.5.1 are vulnerable to Denial of Service (DoS) via the addGitSha function. An attacker can exploit this vulnerability by supplying a specially crafted spec.rawSpec value that triggers the function’s regex replacement and string-manipulation logic, causing excessive CPU consumption and potentially stalling or crashing the process.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
28%
KEV
Not listed

Published

May 26, 2026

Last Modified

July 23, 2026

Advisory Details (2)

Auto-updated Jun 5, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

Denial of Service (DoS) in pacote | CVE-2026-9496 | Snyk

https://security.snyk.io/vuln/SNYK-JS-PACOTE-8225084
generic🔴 Active Exploitation

Denial of Service (DoS) in org.webjars.npm:pacote | CVE-2026-9496 | Snyk

https://security.snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-16874025

Vendor Advisories for CVE-2026-9496(1)

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

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
npm11.12.1~ds1-1 ... 9.2.0~ds3-1 (71 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
npm11.12.1~ds1-1 ... 9.2.0~ds3-1 (20 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
npm11.12.1~ds1-1 ... 9.2.0~ds3-1 (18 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
npm11.12.1~ds1-1 ... 9.2.0~ds3-1 (18 versions)——
npm(1)
PackageVulnerable rangeFixed inDependents
pacote—21.5.1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 35× 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 212 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-9496?
CVE-2026-9496 is a high vulnerability published on May 26, 2026. Versions of the package pacote from 11.2.7 and before 21.5.1 are vulnerable to Denial of Service (DoS) via the addGitSha function. An attacker can exploit this vulnerability by supplying a specially crafted spec.rawSpec value that triggers the function’s regex replacement and string-manipulation…
When was CVE-2026-9496 disclosed?
CVE-2026-9496 was first published in the National Vulnerability Database on May 26, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-9496 actively exploited?
CVE-2026-9496 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 72.1% of all scored CVEs.
What is the CVSS score of CVE-2026-9496?
CVE-2026-9496 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-9496?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-9496, 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-2026-9496

Explore →

Is Your Infrastructure Affected by CVE-2026-9496?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs