CVE-2026-16354

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-21. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — Patch released this week
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: None knownExposed: 0

A fix is available — apply it.

Information disclosure in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity75% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 24, 2026

Advisory Details (4)

Auto-updated Jul 22, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic🔴 Active Exploitation

Security Vulnerabilities fixed in Firefox ESR 140.13 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-70/
generic🔴 Active Exploitation

Security Vulnerabilities fixed in Firefox ESR 115.38 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-69/
generic

Security Vulnerabilities fixed in Firefox 153 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2026-68/
generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=2050626

Vendor Advisories for CVE-2026-16354(2)

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

Patch Availability(2)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatfirefox-0:140.13.0-1.el8_102026-07-28redhat
redhatfirefox-0:140.13.0-1.el10_22026-07-28redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 28× in last 7d / 31× 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. 2026-07-29 09:17 UTCVendor advisory
  2. 2026-07-29 09:17 UTCGHSA enrichment
  3. 2026-07-28 22:20 UTCEG score recompute
  4. 2026-07-28 22:20 UTCGHSA enrichment
  5. 2026-07-28 11:19 UTCGHSA enrichment
  6. 2026-07-28 00:22 UTCEG score recompute
  7. 2026-07-28 00:22 UTCGHSA enrichment
  8. 2026-07-27 14:13 UTCEPSS rescore
  9. 2026-07-27 13:14 UTCGHSA enrichment
  10. 2026-07-27 02:17 UTCGHSA enrichment
  11. 2026-07-26 15:20 UTCEG score recompute
  12. 2026-07-26 15:19 UTCGHSA enrichment
  13. 2026-07-26 14:54 UTCEPSS rescore
  14. 2026-07-26 14:54 UTCEPSS rescore
  15. 2026-07-26 04:23 UTCEG score recompute
  16. 2026-07-26 04:23 UTCGHSA enrichment
  17. 2026-07-25 14:17 UTCEPSS rescore
  18. 2026-07-25 14:17 UTCEPSS rescore
  19. 2026-07-24 14:17 UTCEPSS rescore
  20. 2026-07-23 14:18 UTCEPSS rescore
  21. 2026-07-23 14:18 UTCEPSS rescore
  22. 2026-07-23 03:05 UTCEG score recompute
  23. 2026-07-22 23:17 UTCEG score recompute
  24. 2026-07-22 23:16 UTCGHSA enrichment
  25. 2026-07-22 16:02 UTCEG score recompute▲ 7.50
Show 6 more
  1. 2026-07-22 16:02 UTCGHSA enrichment
  2. 2026-07-22 16:00 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 14:51 UTCNVD update
  5. 2026-07-21 12:50 UTCEG score recompute
  6. 2026-07-21 12:48 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-16354?
CVE-2026-16354 is a high vulnerability published on July 21, 2026. Information disclosure in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
When was CVE-2026-16354 disclosed?
CVE-2026-16354 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16354 actively exploited?
CVE-2026-16354 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 73.3% of all scored CVEs.
What is the CVSS score of CVE-2026-16354?
CVE-2026-16354 has a CVSS v3.1 base score of 7.5 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-16354?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16354, 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

Explore the affected products and dependency analysis for CVE-2026-16354

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