CVE-2023-46734

MEDIUMNVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under NVD CVSS v3. EPSS exploit probability: 0.7%, top 51% 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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 6.1Exploit: None knownExposed: 0

A fix is available — apply it.

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in versions 2.0.0, 5.0.0, and 6.0.0 and prior to versions 4.4.51, 5.4.31, and 6.3.8, some Twig filters in CodeExtension use is_safe=html but don't actually ensure their input is safe. As of versions 4.4.51, 5.4.31, and 6.3.8, Symfony now escapes the output of the affected filters.

CVSS v3
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
49%
KEV
Not listed

Published

November 10, 2023

Last Modified

July 29, 2026

Advisory Details (4)

Auto-updated Jul 29, 2026
Patch available. Sources: github_commit, github.
generic Patch Available

[SECURITY] [DLA 3664-1] symfony security update

https://lists.debian.org/debian-lts-announce/2023/11/msg00019.html
github Patch Available

Potential XSS vulnerabilities in CodeExtension filters · Advisory · symfony/symfony · GitHub

https://github.com/symfony/symfony/security/advisories/GHSA-q847-2q57-wmr3
github_commit Patch Available

commit 9da9a145ce57 (symfony/symfony)

Patch available: symfony/symfony v6.4.37 (contains commit 9da9a145ce57)

https://github.com/symfony/symfony/commit/9da9a145ce57e4585031ad4bee37c497353eec7c
github_commit Patch Available

commit 5d095d5feb13 (symfony/symfony)

Patch available: symfony/symfony v6.4.37 (contains commit 5d095d5feb13)

https://github.com/symfony/symfony/commit/5d095d5feb1322b16450284a04d6bb48d1198f54

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuphp-symfony-zulip-notifier (6.4.5+dfsg-3ubuntu3+esm1) @ noble2026-05-24ubuntu

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

(7 across 6 ecosystems)
Packagist(2)
PackageVulnerable rangeFixed inDependents
symfony/symfonyv6.0.0 ... v6.3.7 (70 versions)6.3.8—
symfony/twig-bridgev6.0.0 ... v6.3.5 (42 versions)6.3.8—
Debian:10(1)
PackageVulnerable rangeFixed inDependents
symfony3.4.22+dfsg-2, 3.4.22+dfsg-2+deb10u1, 3.4.22+dfsg-2+deb10u23.4.22+dfsg-2+deb10u3—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
symfony4.4.19+dfsg-2, 4.4.19+dfsg-2+deb11u1, 4.4.19+dfsg-2+deb11u2, 4.4.19+dfsg-2+deb11u34.4.19+dfsg-2+deb11u4—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
symfony5.4.23+dfsg-15.4.23+dfsg-1+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
symfony—5.4.31+dfsg-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
symfony—5.4.31+dfsg-1—

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 47× 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.

Showing the most recent 100 of 130 total refreshes for this CVE.

  1. 2026-08-10 23:57 UTCEPSS rescore
  2. 2026-08-09 13:44 UTCEPSS rescore
  3. 2026-08-09 13:44 UTCEPSS rescore
  4. 2026-08-08 16:35 UTCEPSS rescore
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  18. 2026-07-29 18:49 UTCEG score recompute
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  1. 2026-07-23 14:16 UTCEPSS rescore
  2. 2026-07-23 02:27 UTCEG score recompute
  3. 2026-07-22 23:14 UTCEG score recompute
  4. 2026-07-22 14:06 UTCEPSS rescore
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  14. 2026-07-15 16:56 UTCEPSS rescore
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  16. 2026-07-15 04:19 UTCOSV refresh
  17. 2026-07-15 01:59 UTCEPSS rescore
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  25. 2026-07-09 19:08 UTCEPSS rescore
  26. 2026-07-08 15:13 UTCEPSS rescore
  27. 2026-07-07 13:44 UTCEPSS rescore
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  37. 2026-06-30 23:21 UTCEPSS rescore
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  42. 2026-06-28 04:55 UTCEPSS rescore
  43. 2026-06-27 05:04 UTCOSV refresh
  44. 2026-06-27 03:07 UTCEPSS rescore
  45. 2026-06-25 13:48 UTCEPSS rescore
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  47. 2026-06-24 14:04 UTCEPSS rescore
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  49. 2026-06-23 21:31 UTCEPSS rescore
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  67. 2026-06-12 23:11 UTCEPSS rescore
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  69. 2026-06-11 13:59 UTCEPSS rescore
  70. 2026-06-10 22:17 UTCEPSS rescore
  71. 2026-06-10 13:21 UTCEPSS rescore
  72. 2026-06-09 15:47 UTCOSV refresh
  73. 2026-06-08 14:16 UTCEPSS rescore
  74. 2026-06-08 14:16 UTCEPSS rescore
  75. 2026-06-07 15:24 UTCEPSS rescore

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2023-46734?
CVE-2023-46734 is a medium vulnerability published on November 10, 2023. Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Starting in versions 2.0.0, 5.0.0, and 6.0.0 and prior to versions 4.4.51, 5.4.31, and 6.3.8, some Twig filters in CodeExtension use is_safe=html but don't actually ensure their input is safe. As of…
When was CVE-2023-46734 disclosed?
CVE-2023-46734 was first published in the National Vulnerability Database on November 10, 2023, with the most recent update on July 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-46734 actively exploited?
CVE-2023-46734 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 50.9% of all scored CVEs.
What is the CVSS score of CVE-2023-46734?
CVE-2023-46734 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2023-46734?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-46734, 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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