CVE-2026-78949

LOWPre-NVD 2.92.9—
EchelonGraph scoreMEDIUM confidence

Score 2.9 from GitHub Security Advisory (severity: LOW) published 2026-08-25. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 2.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
2.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 2.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Observable discrepancy in CustomTabs in Google Chrome on on Android prior to 152.0.7977.65 allowed a local attacker to obtain cross-origin data via a co-installed app. (Chromium security severity: Medium)

CVSS v3
2.9
Vendor severity
MEDIUMper Google (Chromium)Vendor's own band, not a CVSS rating — advisory text: (Chromium security severity: Medium)
EG Score
2.9LOWmedium confidence
EG Risk
13
EG Risk 13/100CISA 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
Severity29% × 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
0.1%
EPSS %ILE
1st
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 25, 2026

Last Modified

September 17, 2026

References (2)

Vendor Advisories for CVE-2026-78949(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
chromium113.0.5672.126-1 ... 152.0.7977.64-1 (412 versions)
  • every version up to 152.0.7977.75-1~deb12u1: fixed in 152.0.7977.75-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 152.0.7977.75-1~deb12u1 (178 versions)
  • every version up to 152.0.7977.75-1~deb13u1: fixed in 152.0.7977.75-1~deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
chromium138.0.7204.183-1 ... 151.0.7922.71-1~deb13u1 (176 versions)
  • every version up to 152.0.7977.64-1: fixed in 152.0.7977.64-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 41× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 75 are merged into the row they repeat.

  1. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-10-09 03:52 UTCEG score recompute
  4. 2026-10-09 03:51 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  5. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-10-06 02:28 UTCEG score recompute
  9. 2026-10-06 02:28 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  12. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-10-03 04:21 UTCEG score recompute
  14. 2026-10-03 04:21 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  15. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-09-30 06:30 UTCEG score recompute
  17. 2026-09-30 06:30 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  18. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-09-26 21:46 UTCEG score recompute
  21. 2026-09-26 21:46 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  22. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  23. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-09-23 17:54 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  25. 2026-09-23 14:45 UTCEG score recompute
Show 46 more
  1. 2026-09-23 14:45 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  2. 2026-09-22 16:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  3. 2026-09-21 21:09 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  4. 2026-09-20 16:54 UTCEG score recompute
  5. 2026-09-20 16:54 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  6. 2026-09-18 19:28 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  7. 2026-09-17 19:04 UTCEG score recompute
  8. 2026-09-17 19:03 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  9. 2026-09-16 14:08 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  10. 2026-09-16 05:15 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  11. 2026-09-15 08:31 UTCEG score recompute
  12. 2026-09-15 08:31 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  13. 2026-09-15 03:12 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  14. 2026-09-12 10:40 UTCEG score recompute
  15. 2026-09-12 10:40 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  16. 2026-09-11 14:53 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  17. 2026-09-09 12:48 UTCEG score recompute
  18. 2026-09-09 12:48 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  19. 2026-09-08 22:01 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  20. 2026-09-06 14:44 UTCEG score recompute
  21. 2026-09-06 14:44 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  22. 2026-09-06 13:48 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  23. 2026-09-04 05:07 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  24. 2026-09-03 16:54 UTCEG score recompute
  25. 2026-09-03 16:54 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  26. 2026-09-02 14:12 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  27. 2026-09-01 13:54 UTCEPSS rescoreEPSS <0.1% · below the 1st percentile
  28. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  29. 2026-08-31 19:01 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  30. 2026-08-31 18:42 UTCEG score recompute
  31. 2026-08-31 18:42 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw · GitHub severity LOW · GitHub CVSS 2.9
  32. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  33. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · below the 1st percentile
  34. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  35. 2026-08-28 20:44 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw
  36. 2026-08-28 19:49 UTCEG score recompute▼ 3.60
  37. 2026-08-28 19:49 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw
  38. 2026-08-28 19:36 UTCMITRE cvelistV5CVSS v3 → 2.9 · severity → LOW
  39. 2026-08-27 19:04 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw
  40. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  41. 2026-08-26 16:40 UTCEG score recompute
  42. 2026-08-26 16:40 UTCGHSA enrichmentGHSA-5cvc-fgqj-75cw
  43. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  44. 2026-08-25 21:25 UTCNVD update
  45. 2026-08-25 20:29 UTCEG score recompute
  46. 2026-08-25 20:25 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-78949?
CVE-2026-78949 is a low vulnerability published on August 25, 2026. Observable discrepancy in CustomTabs in Google Chrome on on Android prior to 152.0.7977.65 allowed a local attacker to obtain cross-origin data via a co-installed app. (Chromium security severity: Medium)
When was the CVE record for CVE-2026-78949 published?
The CVE record for CVE-2026-78949 was published on August 25, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
Is CVE-2026-78949 actively exploited?
CVE-2026-78949 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-78949?
CVE-2026-78949 has a CVSS v3.1 base score of 2.9 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-78949?
A fix for CVE-2026-78949 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-78949 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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