CVE-2026-46637

MEDIUMNVD 5.45.4—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.4 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 93% 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, nvd
5.4
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.4Exploit: NoneExposed: 0

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

Twig is a template language for PHP. Prior to 3.26.0, several filters in twig/markdown-extra and twig/cssinliner-extra are registered with is_safe => [all], causing Twig to treat plain text or HTML output as safe in HTML, JavaScript, CSS, URL, and other contexts where the output is not properly escaped. This issue is fixed in version 3.26.0.

CVSS v3
5.4
EG Score
5.4(medium)
EG Risk
24(Track)
EG Risk 24/100SSVC: 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
Severity54% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
7.2%
KEV
Not listed

Published

May 21, 2026

Last Modified

July 16, 2026

Advisory Details (4)

Auto-updated Jul 16, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

HTML-output filters in twig/* extras incorrectly declared `is_safe => ['all']` · Advisory · twigphp/Twig · GitHub

https://github.com/twigphp/Twig/security/advisories/GHSA-jv8m-2544-3pg3
github_release Patch Available

v3.26.0

Patch available: twigphp/Twig v3.26.0

https://github.com/twigphp/Twig/releases/tag/v3.26.0
github_commit Patch Available

commit e36489d3521e (twigphp/Twig)

Patch available: twigphp/Twig v3.26.0 (contains commit e36489d3521e)

https://github.com/twigphp/Twig/commit/e36489d3521ecbfc08bdcc61294302557035f14a
github_commit Patch Available

commit 84982072c79a (twigphp/Twig)

Patch available: twigphp/Twig v3.26.0 (contains commit 84982072c79a)

https://github.com/twigphp/Twig/commit/84982072c79a7417b0d158a401d91344f3658299

Vendor Advisories for CVE-2026-46637(1)

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

Affected Packages

(2 across 1 ecosystem)
Packagist(2)
PackageVulnerable rangeFixed inDependents
twig/cssinliner-extrav2.12.0 ... v3.9.0 (55 versions)3.26.0—
twig/markdown-extrav2.12.0 ... v3.9.0 (60 versions)3.26.0—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 15× 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. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 03:17 UTCEG score recompute▲ 0.30
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:24 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 02:29 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 16:30 UTCNVD updateCVSS v3 → 5.4
  11. 2026-07-16 15:23 UTCMITRE cvelistV5CVSS v3 → 5.1
  12. 2026-07-15 20:24 UTCNVD updateCVSS v3 → 5.4
  13. 2026-07-15 16:57 UTCEPSS rescore
  14. 2026-07-14 21:36 UTCEG score recompute▲ 5.10
  15. 2026-07-14 21:35 UTCMITRE cvelistV5CVSS v3 → 5.1 · CVSS v4 → 5.1 · severity → MEDIUM
  16. 2026-06-14 23:18 UTCEPSS rescore
  17. 2026-06-13 23:00 UTCEPSS rescore
  18. 2026-06-12 23:12 UTCEPSS rescore
  19. 2026-05-24 06:10 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-46637?
CVE-2026-46637 is a medium vulnerability published on May 21, 2026. Twig is a template language for PHP. Prior to 3.26.0, several filters in twig/markdown-extra and twig/cssinliner-extra are registered with is_safe => [all], causing Twig to treat plain text or HTML output as safe in HTML, JavaScript, CSS, URL, and other contexts where the output is not properly…
When was CVE-2026-46637 disclosed?
CVE-2026-46637 was first published in the National Vulnerability Database on May 21, 2026, with the most recent update on July 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46637 actively exploited?
CVE-2026-46637 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-46637?
CVE-2026-46637 has a CVSS v3 base score of 5.4 (NVD).
How do I remediate CVE-2026-46637?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46637, 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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