CVE-2026-46633

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-21. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2026-44558 (ENISA EUVD) · GHSA-7p85-w9px-jpjp (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Twig is a template language for PHP. Starting in 1.15.1 and prior to 3.26.0, Compiler::string() does not escape single quotes when a template name from a {% use %} tag is placed inside a PHP single-quoted string literal, allowing a crafted template name to terminate the string and inject arbitrary PHP expressions into the compiled cache file. This issue is fixed in version 3.26.0.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.8% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.8%
EPSS %ILE
56th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.8% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 21, 2026

Last Modified

November 4, 2026

Advisory Details (8)

Auto-updated Nov 7, 2026
Patch available. Sources: github, github_commit, github_release.
Web page

CVE-2026-46633: PHP code injection via `{% use %}` template name (Symfony Blog)

https://symfony.com/cve-2026-46633
GitHub advisoryMentions a patch (unverified)

PHP code injection via `{% use %}` template name · Advisory · twigphp/Twig · GitHub

https://github.com/twigphp/Twig/security/advisories/GHSA-7p85-w9px-jpjp
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 e9ff55f69108 (twigphp/Twig)

Patch available: twigphp/Twig v3.26.0 (contains commit e9ff55f69108)

https://github.com/twigphp/Twig/commit/e9ff55f6910832428e48a35b2e0748189ad49ae3
GitHub commit Patch Available

commit a2c6db7ea7d2 (twigphp/Twig)

Patch available: twigphp/Twig v3.24.0 (contains commit a2c6db7ea7d2)

https://github.com/twigphp/Twig/commit/a2c6db7ea7d2c90923e6708019ec1442526d1c30
GitHub commit Patch Available

commit 679447fa2908 (twigphp/Twig)

Patch available: twigphp/Twig v3.26.0 (contains commit 679447fa2908)

https://github.com/twigphp/Twig/commit/679447fa29083043665482ccf7d64372472621b8
Web page

security-advisories/twig/twig/CVE-2026-46633.yaml at master · FriendsOfPHP/security-advisories · GitHub

https://github.com/FriendsOfPHP/security-advisories/blob/master/twig/twig/CVE-2026-46633.yaml
Web page

This research documents my development of payloads for the CVE-2026-46633. · GitHub

https://gist.github.com/vladko312/d61b950f168c791db4786b83dc7a81e6

Vendor Advisories for CVE-2026-46633(1)

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

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
composertwig/twig @ 3.26.0 (fixes >= 1.15.1, < 3.26.0)—ghsa

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.

Affected Packages

(5 across 5 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
php-twig2.14.3-1 ... 4.0.0~alpha1-1 (88 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
php-twig3.5.1-1, 3.5.1-1+deb12u1, 3.5.1-1+deb12u2
  • every version up to 3.5.1-1+deb12u3: fixed in 3.5.1-1+deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
php-twig3.20.0-2 ... 3.26.0-1 (16 versions)
  • every version up to 3.27.0-0+deb13u1: fixed in 3.27.0-0+deb13u1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
php-twig3.20.0-2 ... 3.24.0-1 (14 versions)
  • every version up to 3.26.0-1: fixed in 3.26.0-1
—
Packagist(1)
PackageVulnerable rangeFix by version rangeDependents
twig/twigv1.15.1 ... v3.9.3 (206 versions)
  • 1.15.1 up to 3.26.0: fixed in 3.26.0
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 46× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 193 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 93 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 05:30 UTCEchelonGraph re-scored
  2. 2026-11-13 05:30 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-12 16:34 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  4. 2026-11-12 04:07 UTCEchelonGraph re-scored
  5. 2026-11-12 04:07 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  6. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  7. 2026-11-11 02:43 UTCEchelonGraph re-scored
  8. 2026-11-11 02:43 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  9. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  10. 2026-11-10 08:32 UTCEchelonGraph re-scored
  11. 2026-11-10 08:32 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  12. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.8% · 56th percentile
  13. 2026-11-09 07:11 UTCEchelonGraph re-scored
  14. 2026-11-09 07:11 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-11-08 16:39 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  16. 2026-11-08 05:49 UTCEchelonGraph re-scored
  17. 2026-11-08 05:49 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  18. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  19. 2026-11-07 04:29 UTCEchelonGraph re-scored
  20. 2026-11-07 04:29 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-11-06 16:38 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  22. 2026-11-06 09:55 UTCOSV refresh
  23. 2026-11-06 03:08 UTCEchelonGraph re-scored
  24. 2026-11-06 03:08 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  25. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.8% · 55th percentile
Show 75 more
  1. 2026-11-05 01:48 UTCEchelonGraph re-scored
  2. 2026-11-05 01:48 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.8% · 55th percentile
  4. 2026-11-04 00:27 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-11-04 00:11 UTCEchelonGraph re-scored
  6. 2026-11-04 00:11 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-11-03 22:54 UTCEchelonGraph re-scored
  8. 2026-11-03 22:54 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL
  9. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  10. 2026-11-02 21:33 UTCEchelonGraph re-scored
  11. 2026-11-02 21:33 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL
  12. 2026-11-02 16:45 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  13. 2026-11-01 20:11 UTCEchelonGraph re-scored
  14. 2026-11-01 20:11 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL
  15. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  16. 2026-11-01 07:48 UTCGHSA enrichmentGHSA-7p85-w9px-jpjp · GitHub severity CRITICAL
  17. 2026-10-31 18:51 UTCEchelonGraph re-scored
  18. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  19. 2026-10-30 17:30 UTCEchelonGraph re-scored
  20. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  21. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  22. 2026-10-29 16:09 UTCEchelonGraph re-scored
  23. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  24. 2026-10-28 14:47 UTCEchelonGraph re-scored
  25. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  26. 2026-10-27 05:12 UTCEchelonGraph re-scored
  27. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  28. 2026-10-25 23:50 UTCEchelonGraph re-scored
  29. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  30. 2026-10-25 14:25 UTCEchelonGraph re-scored
  31. 2026-10-24 19:07 UTCEchelonGraph re-scored
  32. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  33. 2026-10-23 17:44 UTCEchelonGraph re-scored
  34. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  35. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  36. 2026-10-22 16:23 UTCEchelonGraph re-scored
  37. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  38. 2026-10-21 15:02 UTCEchelonGraph re-scored
  39. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  40. 2026-10-20 13:41 UTCEchelonGraph re-scored
  41. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  42. 2026-10-19 12:19 UTCEchelonGraph re-scored
  43. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  44. 2026-10-18 03:36 UTCEchelonGraph re-scored
  45. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  46. 2026-10-17 09:10 UTCEchelonGraph re-scored
  47. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  48. 2026-10-16 07:49 UTCEchelonGraph re-scored
  49. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  50. 2026-10-15 06:27 UTCEchelonGraph re-scored
  51. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  52. 2026-10-14 02:07 UTCEchelonGraph re-scored
  53. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  54. 2026-10-12 22:25 UTCEchelonGraph re-scored
  55. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  56. 2026-10-12 16:02 UTCEchelonGraph re-scored
  57. 2026-10-11 19:45 UTCEchelonGraph re-scored
  58. 2026-10-11 16:59 UTCEchelonGraph re-scored
  59. 2026-10-11 14:25 UTCEchelonGraph re-scored
  60. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  61. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  62. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  63. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  64. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  65. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  66. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  67. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  68. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  69. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  70. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  71. 2026-09-30 10:47 UTCOSV refresh
  72. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  73. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  74. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  75. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.7% · 50th percentile

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Frequently asked(5)

What is CVE-2026-46633?
CVE-2026-46633 is a critical-severity vulnerability; its CVE record was published on May 21, 2026. Twig is a template language for PHP. Starting in 1.15.1 and prior to 3.26.0, Compiler::string() does not escape single quotes when a template name from a {% use %} tag is placed inside a PHP single-quoted string literal, allowing a crafted template name to terminate the string and inject arbitrary…
When was the CVE record for CVE-2026-46633 published?
The CVE record for CVE-2026-46633 was published on May 21, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of November 4, 2026; the record at its source may have been updated since.
Is CVE-2026-46633 actively exploited?
CVE-2026-46633 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (56th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-46633?
CVE-2026-46633 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-46633?
A fix for CVE-2026-46633 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-46633 are linked in the Vendor Advisories panel on this page.

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