CVE-2026-53496

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 62% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

ExifReader is a JavaScript Exif information parser. Prior to 4.40.1, ExifReader.load() and the asynchronous file and URL loaders can pass attacker-supplied HEIC or AVIF data to the ISO-BMFF parser in src/image-header-iso-bmff.js, where findMetaBox() and parseBox() accept an eight-byte box header without confirming that fields required by the parsed box remain in the DataView. A valid ftyp box followed by an empty free or unknown box can cause an unchecked full-box version read, while a truncated extended-size box can make getBoxLength() and hasEmptyHighBits() read absent size fields. The resulting RangeError escapes the main parsing path and can abort an application request or worker when parse errors are not defensively caught, causing denial of service. This issue is fixed in version 4.40.1.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
55(Attend)
EG Risk 55/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

July 17, 2026

Last Modified

September 14, 2026

Advisory Details (3)

Auto-updated Sep 14, 2026
Patch available. Sources: github, github_commit, github_release.
github_release Patch Available

4.40.1: Robustness fixes for malformed and truncated input

Patch available: mattiasw/ExifReader v4.40.1

https://github.com/mattiasw/ExifReader/releases/tag/v4.40.1
github_commit Patch Available

commit 00878ca9df0e (mattiasw/ExifReader)

Patch available: mattiasw/ExifReader v4.40.1 (contains commit 00878ca9df0e)

https://github.com/mattiasw/ExifReader/commit/00878ca9df0e26480dda7a931c888048c9f7be45
github Patch Available

ExifReader HEIC/AVIF ISO-BMFF parser throws uncaught RangeError on truncated boxes · Advisory · mattiasw/ExifReader · GitHub

https://github.com/mattiasw/ExifReader/security/advisories/GHSA-g77h-45rf-hcx4

Vendor Advisories for CVE-2026-53496(1)

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

Affected Packages

(1 across 1 ecosystem)
npm(1)
PackageVulnerable rangeFixed inDependents
exifreader—4.40.1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-17 10:14 UTCEG score recompute
  3. 2026-09-16 14:08 UTCEPSS rescore
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-14 19:23 UTCEG score recompute
  6. 2026-09-14 18:55 UTCEG score recompute
  7. 2026-09-14 18:08 UTCEG score recompute
  8. 2026-07-30 19:16 UTCEG score recompute
  9. 2026-07-26 11:17 UTCEG score recompute
  10. 2026-07-23 03:19 UTCEG score recompute
  11. 2026-07-17 21:00 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-53496?
CVE-2026-53496 is a medium vulnerability published on July 17, 2026. ExifReader is a JavaScript Exif information parser. Prior to 4.40.1, ExifReader.load() and the asynchronous file and URL loaders can pass attacker-supplied HEIC or AVIF data to the ISO-BMFF parser in src/image-header-iso-bmff.js, where findMetaBox() and parseBox() accept an eight-byte box header…
When was CVE-2026-53496 disclosed?
CVE-2026-53496 was first published in the National Vulnerability Database on July 17, 2026, with the most recent update on September 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53496 actively exploited?
CVE-2026-53496 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 61.5% of all scored CVEs.
What is the CVSS score of CVE-2026-53496?
CVE-2026-53496 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-53496?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53496, 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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