CVE-2026-17978

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory published 2026-07-30. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 4 sources updated this week
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Side-channel information leakage in WebCodecs in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Low)

CVSS v3
5.3
Vendor severity
LOWper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Low)
EG Score
5.3MEDIUMmedium 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
Severity53% × 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
19th
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

July 30, 2026

Last Modified

August 3, 2026

Advisory Details (2)

Auto-updated Jul 30, 2026
Patch available.
generic

Chromium

https://issues.chromium.org/issues/519610845
generic

Chrome Releases: Stable Channel Update for Desktop

https://chromereleases.googleblog.com/2026/07/stable-channel-update-for-desktop_0887107924.html

Vendor Advisories for CVE-2026-17978(2)

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
chromium100.0.4896.127-1 ... 99.0.4844.84-1~deb11u1 (500 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
chromium113.0.5672.126-1 ... 151.0.7922.47-1 (394 versions)
  • every version up to 151.0.7922.71-1~deb12u1: fixed in 151.0.7922.71-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 151.0.7922.71-1~deb12u1 (160 versions)
  • every version up to 151.0.7922.71-1~deb13u1: fixed in 151.0.7922.71-1~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 151.0.7922.71-1~deb13u1 (161 versions)
  • every version up to 151.0.7922.71-1: fixed in 151.0.7922.71-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 16× in last 7d / 80× 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 223 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-17978?
CVE-2026-17978 is a medium vulnerability published on July 30, 2026. Side-channel information leakage in WebCodecs in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to obtain potentially sensitive information from process memory via a crafted HTML page. (Chromium security severity: Low)
When was CVE-2026-17978 disclosed?
CVE-2026-17978 was first published on July 30, 2026, with the most recent update on August 3, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-17978 actively exploited?
CVE-2026-17978 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (19th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-17978?
CVE-2026-17978 has a CVSS v3.1 base score of 5.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-17978?
A fix for CVE-2026-17978 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-17978 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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