CVE-2026-62996

MEDIUMPre-NVD 6.96.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (41st percentile of EPSS-scored CVEs). 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
6.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.9Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. From 5.0.0 until 5.8.4, Smarty's stream: resource-name handling does not adequately restrict which PHP stream wrappers and filter chains can be referenced from a template, allowing a php://filter-wrapped resource name to be used to read the contents of arbitrary local files accessible to the PHP process. An attacker able to author or influence a template's resource reference could exploit this to disclose sensitive file contents outside the intended template/config scope. This issue is fixed in version 5.8.4.

CVSS v3
6.9
EG Score
6.9MEDIUMmedium confidence
EG Risk
47
EG Risk 47/100CISA 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
Severity69% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
41st
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (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 7, 2026

Last Modified

September 9, 2026

Advisory Details (4)

Auto-updated Aug 7, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_commit, github_release, github.
github_release Patch Available

Release v5.8.4 (smarty-php/smarty)

Patch available: smarty-php/smarty v5.8.4

https://github.com/smarty-php/smarty/releases/tag/v5.8.4
github_commit Patch Available

commit 3c9f77a2e06c (smarty-php/smarty)

Patch available: smarty-php/smarty v5.8.4 (contains commit 3c9f77a2e06c)

https://github.com/smarty-php/smarty/commit/3c9f77a2e06ce319ae0092496af32cc8f3adc52e
github_pr Patch Available

Security: validate nested stream wrapper in stream: resource (CWE-22)

Patch available: smarty-php/smarty v5.8.4 (PR #1195 merged 2026-06-29)

https://github.com/smarty-php/smarty/pull/1195
github Patch Available🟡 PoC Available

Smarty Security stream restriction bypass through stream: resource · Advisory · smarty-php/smarty · GitHub

https://github.com/smarty-php/smarty/security/advisories/GHSA-rjhh-76wf-8xmw

Vendor Advisories for CVE-2026-62996(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)
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
smarty/smartyv5.0.0 ... v5.8.3 (22 versions)
  • 5.0.0 up to 5.8.4: fixed in 5.8.4
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 41× 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. 2026-10-05 08:15 UTCEG score recompute
  2. 2026-10-04 23:22 UTCEPSS rescore
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  20. 2026-09-20 20:16 UTCEPSS rescore
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  1. 2026-09-16 11:13 UTCEG score recompute
  2. 2026-09-16 05:15 UTCEPSS rescore
  3. 2026-09-15 09:11 UTCEG score recompute
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  7. 2026-09-11 14:53 UTCEPSS rescore
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  9. 2026-09-11 01:03 UTCEG score recompute
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  22. 2026-09-02 00:47 UTCEG score recompute
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  25. 2026-08-31 22:28 UTCEG score recompute
  26. 2026-08-30 19:17 UTCEPSS rescore
  27. 2026-08-30 18:00 UTCEG score recompute
  28. 2026-08-30 01:22 UTCEPSS rescore
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  30. 2026-08-28 21:42 UTCEPSS rescore
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  32. 2026-08-27 14:25 UTCEPSS rescore
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  34. 2026-08-26 14:46 UTCEPSS rescore
  35. 2026-08-26 07:09 UTCEG score recompute
  36. 2026-08-25 13:49 UTCEPSS rescore
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  38. 2026-08-23 00:53 UTCEG score recompute
  39. 2026-08-23 00:19 UTCEPSS rescore
  40. 2026-08-21 23:49 UTCEPSS rescore
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  42. 2026-08-20 22:55 UTCEPSS rescore
  43. 2026-08-19 18:47 UTCEG score recompute
  44. 2026-08-19 17:04 UTCEPSS rescore
  45. 2026-08-18 15:40 UTCEG score recompute
  46. 2026-08-18 13:48 UTCEPSS rescore
  47. 2026-08-17 13:47 UTCEPSS rescore
  48. 2026-08-17 12:40 UTCEG score recompute
  49. 2026-08-16 14:56 UTCEPSS rescore
  50. 2026-08-16 10:38 UTCEG score recompute
  51. 2026-08-15 08:37 UTCEG score recompute
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  60. 2026-08-09 22:29 UTCEG score recompute
  61. 2026-08-09 13:47 UTCEPSS rescore
  62. 2026-08-08 20:28 UTCEG score recompute
  63. 2026-08-08 16:37 UTCEPSS rescore
  64. 2026-08-07 18:26 UTCEG score recompute
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  66. 2026-08-07 16:23 UTCEG score recompute
  67. 2026-08-07 15:23 UTCEG score recompute
  68. 2026-08-07 15:22 UTCMITRE cvelistV5first tracked

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-62996?
CVE-2026-62996 is a medium vulnerability published on August 7, 2026. Smarty is a template engine for PHP, facilitating the separation of presentation (HTML/CSS) from application logic. From 5.0.0 until 5.8.4, Smarty's stream: resource-name handling does not adequately restrict which PHP stream wrappers and filter chains can be referenced from a template, allowing a…
When was CVE-2026-62996 disclosed?
CVE-2026-62996 was first published on August 7, 2026, with the most recent update on September 9, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62996 actively exploited?
CVE-2026-62996 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (41st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62996?
CVE-2026-62996 has a CVSS base score of 6.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-62996?
A fix for CVE-2026-62996 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-62996 are linked in the Vendor Advisories panel on this page.

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