CVE-2026-48806

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 65% 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
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 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 3.27.0, ArrayExpression does not guard dynamic mapping keys that are coerced to strings, allowing PHP to invoke __toString() on a Stringable object used as a mapping key without calling SandboxExtension::ensureToStringAllowed(). This issue is fixed in version 3.27.0.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
35%
KEV
Not listed

Published

June 30, 2026

Last Modified

July 17, 2026

Advisory Details (3)

Auto-updated Aug 1, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Sandbox `__toString()` policy bypass via dynamic mapping keys · Advisory · twigphp/Twig · GitHub

https://github.com/twigphp/Twig/security/advisories/GHSA-5v5v-ww74-355v
github_release Patch Available

v3.27.0

Patch available: twigphp/Twig v3.27.0

https://github.com/twigphp/Twig/releases/tag/v3.27.0
github_commit Patch Available

commit 9ff41014639e (twigphp/Twig)

Patch available: twigphp/Twig v3.27.0 (contains commit 9ff41014639e)

https://github.com/twigphp/Twig/commit/9ff41014639ef0e8eb50ac7669191c309d863105

Vendor Advisories for CVE-2026-48806(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 2 ecosystems)
Debian:14(1)
PackageVulnerable rangeFixed inDependents
php-twig3.20.0-2 ... 3.26.0-1 (15 versions)3.27.0-1—
Packagist(1)
PackageVulnerable rangeFixed inDependents
twig/twig1.3.0 ... v3.9.3 (243 versions)3.27.0—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 53× 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. 2026-08-25 13:49 UTCEPSS rescore
  2. 2026-08-24 21:08 UTCEG score recompute
  3. 2026-08-24 11:39 UTCEG score recompute
  4. 2026-08-23 00:47 UTCEG score recompute
  5. 2026-08-23 00:19 UTCEPSS rescore
  6. 2026-08-22 08:20 UTCEG score recompute
  7. 2026-08-21 23:49 UTCEPSS rescore
  8. 2026-08-21 00:25 UTCEG score recompute
  9. 2026-08-20 22:55 UTCEPSS rescore
  10. 2026-08-20 05:30 UTCEG score recompute
  11. 2026-08-19 17:04 UTCEPSS rescore
  12. 2026-08-18 23:00 UTCEG score recompute
  13. 2026-08-18 13:48 UTCEPSS rescore
  14. 2026-08-17 17:15 UTCEG score recompute
  15. 2026-08-17 13:47 UTCEPSS rescore
  16. 2026-08-16 19:56 UTCEG score recompute
  17. 2026-08-16 14:56 UTCEPSS rescore
  18. 2026-08-16 05:54 UTCEG score recompute
  19. 2026-08-16 02:14 UTCEPSS rescore
  20. 2026-08-15 04:10 UTCEG score recompute
  21. 2026-08-15 01:30 UTCEPSS rescore
  22. 2026-08-13 22:28 UTCEG score recompute
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-12 15:53 UTCEG score recompute
  25. 2026-08-12 13:51 UTCEPSS rescore
Show 48 more
  1. 2026-08-11 14:20 UTCEG score recompute
  2. 2026-08-11 01:34 UTCEG score recompute
  3. 2026-08-11 00:00 UTCEPSS rescore
  4. 2026-08-09 14:47 UTCEG score recompute
  5. 2026-08-09 13:46 UTCEPSS rescore
  6. 2026-08-08 17:33 UTCEG score recompute
  7. 2026-08-08 16:37 UTCEPSS rescore
  8. 2026-08-07 20:20 UTCEG score recompute
  9. 2026-08-06 13:52 UTCEG score recompute
  10. 2026-08-06 13:47 UTCEPSS rescore
  11. 2026-08-05 20:53 UTCEG score recompute
  12. 2026-08-05 19:17 UTCEPSS rescore
  13. 2026-08-04 18:57 UTCEG score recompute
  14. 2026-08-04 15:10 UTCEPSS rescore
  15. 2026-08-04 14:42 UTCEG score recompute
  16. 2026-08-04 10:39 UTCEPSS rescore
  17. 2026-08-02 06:22 UTCEG score recompute
  18. 2026-08-02 02:27 UTCEPSS rescore
  19. 2026-08-01 04:46 UTCEG score recompute
  20. 2026-08-01 04:16 UTCEPSS rescore
  21. 2026-07-30 17:36 UTCEG score recompute
  22. 2026-07-30 16:28 UTCEPSS rescore
  23. 2026-07-30 13:11 UTCEG score recompute
  24. 2026-07-30 02:35 UTCEG score recompute
  25. 2026-07-30 01:30 UTCEPSS rescore
  26. 2026-07-28 19:12 UTCEG score recompute
  27. 2026-07-28 15:37 UTCEPSS rescore
  28. 2026-07-27 16:50 UTCEG score recompute
  29. 2026-07-26 18:37 UTCEG score recompute
  30. 2026-07-26 14:54 UTCEPSS rescore
  31. 2026-07-26 13:51 UTCEG score recompute
  32. 2026-07-25 14:18 UTCEPSS rescore
  33. 2026-07-24 14:18 UTCEPSS rescore
  34. 2026-07-23 14:18 UTCEPSS rescore
  35. 2026-07-23 03:18 UTCEG score recompute▲ 2.00
  36. 2026-07-22 14:08 UTCEPSS rescore
  37. 2026-07-21 15:25 UTCEPSS rescore
  38. 2026-07-20 17:08 UTCEPSS rescore
  39. 2026-07-19 14:31 UTCEPSS rescore
  40. 2026-07-19 14:31 UTCEPSS rescore
  41. 2026-07-19 02:29 UTCEPSS rescore
  42. 2026-07-18 10:04 UTCEPSS rescore
  43. 2026-07-17 03:24 UTCNVD updateCVSS v3 → 9.1 · severity → CRITICAL
  44. 2026-07-16 17:03 UTCEPSS rescore
  45. 2026-07-15 16:57 UTCEPSS rescore
  46. 2026-07-14 21:36 UTCEG score recompute▲ 7.10
  47. 2026-07-14 21:35 UTCMITRE cvelistV5CVSS v3 → 7.1 · CVSS v4 → 7.1 · severity → HIGH
  48. 2026-06-30 19:31 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-48806?
CVE-2026-48806 is a critical vulnerability published on June 30, 2026. Twig is a template language for PHP. Prior to 3.27.0, ArrayExpression does not guard dynamic mapping keys that are coerced to strings, allowing PHP to invoke toString() on a Stringable object used as a mapping key without calling SandboxExtension::ensureToStringAllowed(). This issue is fixed in…
When was CVE-2026-48806 disclosed?
CVE-2026-48806 was first published in the National Vulnerability Database on June 30, 2026, with the most recent update on July 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-48806 actively exploited?
CVE-2026-48806 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 65.4% of all scored CVEs.
What is the CVSS score of CVE-2026-48806?
CVE-2026-48806 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-48806?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48806, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-48806

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