Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 7.3.0-BETA1 until 7.4.12 and 8.0.12, the JsonPath component compiles attacker-controlled match() and search() filter patterns directly into preg_match() without a length cap, i-regexp restriction, or bounded backtracking, allowing catastrophic-backtracking expressions to pin worker CPU and cause denial of service. This issue is fixed in versions 7.4.12 and 8.0.12.
CVE-2026-45756
HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 56% 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
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 49(Track)EG Risk 49/100SSVC: 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 computedSeverity75% × 45%Exploitation1% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 43.7%
- KEV
- Not listed
Published
May 28, 2026
Last Modified
July 21, 2026
Advisory Details (4)
Auto-updated Jul 14, 2026Patch available. Sources: github_commit, github_release, github.
github Patch Available
JsonPath Evaluates Attacker-Controlled Regular Expressions in match()/search() Without Limits: ReDoS · Advisory · symfony/symfony · GitHub
https://github.com/symfony/symfony/security/advisories/GHSA-8v8v-g73j-492jgithub_release Patch Available
v8.0.12
Patch available: symfony/symfony v8.0.12
https://github.com/symfony/symfony/releases/tag/v8.0.12github_release Patch Available
v7.4.12
Patch available: symfony/symfony v7.4.12
https://github.com/symfony/symfony/releases/tag/v7.4.12github_commit Patch Available
commit 1ac2d47418ec (symfony/symfony)
Patch available: symfony/symfony v7.4.12 (contains commit 1ac2d47418ec)
https://github.com/symfony/symfony/commit/1ac2d47418ec23066112db1e6ca35be6fe123d14Vendor Advisories for CVE-2026-45756(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)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| symfony/json-path | v8.0.0, v8.0.1, v8.0.3, v8.0.4, v8.0.8 | 8.0.12 | — |
| symfony/symfony | v8.0.0 ... v8.0.9 (12 versions) | 8.0.12 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 14× 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.
- 2026-07-23 14:18 UTCEPSS rescore
- 2026-07-23 03:16 UTCEG score recompute
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:24 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 02:29 UTCEPSS rescore
- 2026-07-18 10:04 UTCEPSS rescore
- 2026-07-16 17:03 UTCEPSS rescore
- 2026-07-16 02:52 UTCEG score recompute▼ 0.70
- 2026-07-15 16:57 UTCEPSS rescore
- 2026-07-15 16:23 UTCNVD updateCVSS v3 → 7.5
- 2026-07-14 18:07 UTCEG score recompute▲ 8.20
- 2026-07-14 18:05 UTCMITRE cvelistV5CVSS v3 → 8.2 · CVSS v4 → 8.2 · severity → HIGH
- 2026-06-14 23:18 UTCEPSS rescore
- 2026-06-13 23:00 UTCEPSS rescore
- 2026-06-12 23:12 UTCEPSS rescore
- 2026-05-28 18:06 UTCEG score recompute
Related CVEs(same CWE)
Same CWE
10 shownCWE-400
Frequently asked(5)
What is CVE-2026-45756?
CVE-2026-45756 is a high vulnerability published on May 28, 2026. Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 7.3.0-BETA1 until 7.4.12 and 8.0.12, the JsonPath component compiles attacker-controlled match() and search() filter patterns directly into preg_match() without a length cap, i-regexp restriction,…
When was CVE-2026-45756 disclosed?
CVE-2026-45756 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45756 actively exploited?
CVE-2026-45756 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 43.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45756?
CVE-2026-45756 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-45756?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45756, 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-2026-45756
Is Your Infrastructure Affected by CVE-2026-45756?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.