CVE-2026-48736

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 0.5%, top 63% 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
Trending — 3 sources updated this week
8.6
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 8.6Exploit: NoneExposed: 0

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

Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.0 to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, NoPrivateNetworkHttpClient and IpUtils::PRIVATE_SUBNETS omitted IPv6 transition prefixes such as 6to4, NAT64, Teredo, and IPv4-compatible IPv6, allowing attacker-supplied URLs to represent private IPv4 targets in forms that IpUtils::isPrivateIp() did not block. This issue is fixed in versions 5.4.53, 6.4.41, 7.4.13, and 8.0.13.

CVSS v3
8.6
EG Score
8.6(medium)
EG Risk
—
EPSS
37.4%
KEV
Not listed

Published

June 15, 2026

Last Modified

July 16, 2026

Advisory Details (6)

Auto-updated Jul 15, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

IpUtils::PRIVATE_SUBNETS Omits IPv6 Transition Forms (6to4, NAT64, Teredo, IPv4-compatible): SSRF Bypass in NoPrivateNetworkHttpClient · Advisory · symfony/symfony · GitHub

https://github.com/symfony/symfony/security/advisories/GHSA-38cx-cq6f-5755
github_release Patch Available

v7.4.13

Patch available: symfony/symfony v7.4.13

https://github.com/symfony/symfony/releases/tag/v7.4.13
github_release Patch Available

v6.4.41

Patch available: symfony/symfony v6.4.41

https://github.com/symfony/symfony/releases/tag/v6.4.41
github_release Patch Available

v5.4.53

Patch available: symfony/symfony v5.4.53

https://github.com/symfony/symfony/releases/tag/v5.4.53
github_commit Patch Available

commit 85b831555be8 (symfony/symfony)

Patch available: symfony/symfony v6.4.41 (contains commit 85b831555be8)

https://github.com/symfony/symfony/commit/85b831555be8ea1f43bf01078afe87bc4c92f65e
github_commit Patch Available

commit 82765368cf74 (symfony/symfony)

Patch available: symfony/symfony v5.4.53 (contains commit 82765368cf74)

https://github.com/symfony/symfony/commit/82765368cf74177c36613575182f168a2eb765b2

Vendor Advisories for CVE-2026-48736(1)

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

Affected Packages

(3 across 1 ecosystem)
Packagist(3)
PackageVulnerable rangeFixed inDependents
symfony/http-clientv5.4.0 ... v5.4.9 (41 versions)5.4.53—
symfony/http-foundationv8.0.0 ... v8.0.8 (8 versions)8.0.13—
symfony/symfonyv8.0.0 ... v8.0.9 (13 versions)8.0.13—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 13× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-21 15:25 UTCEPSS rescore
  3. 2026-07-20 17:08 UTCEPSS rescore
  4. 2026-07-19 14:31 UTCEPSS rescore
  5. 2026-07-19 14:31 UTCEPSS rescore
  6. 2026-07-19 02:29 UTCEPSS rescore
  7. 2026-07-18 10:04 UTCEPSS rescore
  8. 2026-07-16 22:57 UTCEG score recompute▲ 1.70
  9. 2026-07-16 17:03 UTCEPSS rescore
  10. 2026-07-16 04:26 UTCNVD updateCVSS v3 → 8.6 · severity → HIGH
  11. 2026-07-15 16:57 UTCEPSS rescore
  12. 2026-07-14 19:34 UTCEG score recompute▲ 6.90
  13. 2026-07-14 19:31 UTCMITRE cvelistV5CVSS v3 → 6.9 · CVSS v4 → 6.9
  14. 2026-06-15 17:45 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-48736?
CVE-2026-48736 is a high vulnerability published on June 15, 2026. Symfony is a PHP framework for web and console applications and a set of reusable PHP components. From 5.4.0 to 5.4.53, 6.4.41, 7.4.13, and 8.0.13, NoPrivateNetworkHttpClient and IpUtils::PRIVATE_SUBNETS omitted IPv6 transition prefixes such as 6to4, NAT64, Teredo, and IPv4-compatible IPv6,…
When was CVE-2026-48736 disclosed?
CVE-2026-48736 was first published in the National Vulnerability Database on June 15, 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-2026-48736 actively exploited?
CVE-2026-48736 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-48736?
CVE-2026-48736 has a CVSS v3 base score of 8.6 (NVD).
How do I remediate CVE-2026-48736?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-48736, 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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