CVE-2026-48736

HIGHNVD 8.68.6—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.6 under NVD CVSS v3. EPSS exploit probability: 0.6%, top 55% 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
8.6EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.6Exploit: None knownExposed: 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
39(Track)
EG Risk 39/100SSVC: 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
Severity86% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
45%
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

(7 across 5 ecosystems)
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—
Debian:11(1)
PackageVulnerable rangeFixed inDependents
symfony4.4.19+dfsg-2 ... 8.1.3+dfsg-1 (200 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
symfony5.4.23+dfsg-1 ... 5.4.52+dfsg-0+deb12u1 (22 versions)5.4.53+dfsg-0+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
symfony6.4.21+dfsg-2, 6.4.21+dfsg-2+deb13u1, 6.4.24+dfsg-1, 6.4.25+dfsg-1, 6.4.40+dfsg-0+deb13u16.4.41+dfsg-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
symfony6.4.21+dfsg-2 ... 7.4.9+dfsg-1 (53 versions)7.4.13+dfsg-1—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 51× 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. 2026-08-26 14:46 UTCEPSS rescore
  2. 2026-08-25 13:49 UTCEPSS rescore
  3. 2026-08-24 23:34 UTCEG score recompute
  4. 2026-08-23 09:48 UTCEG score recompute
  5. 2026-08-23 00:19 UTCEPSS rescore
  6. 2026-08-21 23:49 UTCEPSS rescore
  7. 2026-08-21 07:42 UTCEG score recompute
  8. 2026-08-20 22:55 UTCEPSS rescore
  9. 2026-08-20 08:41 UTCEG score recompute
  10. 2026-08-19 17:04 UTCEPSS rescore
  11. 2026-08-19 13:14 UTCEG score recompute
  12. 2026-08-18 13:48 UTCEPSS rescore
  13. 2026-08-17 13:47 UTCEPSS rescore
  14. 2026-08-16 22:28 UTCEG score recompute
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 10:41 UTCEG score recompute
  17. 2026-08-16 02:14 UTCEPSS rescore
  18. 2026-08-15 10:21 UTCEG score recompute
  19. 2026-08-15 01:30 UTCEPSS rescore
  20. 2026-08-13 22:20 UTCEG score recompute
  21. 2026-08-13 22:00 UTCEPSS rescore
  22. 2026-08-12 23:27 UTCEG score recompute
  23. 2026-08-12 13:51 UTCEPSS rescore
  24. 2026-08-12 00:33 UTCEG score recompute
  25. 2026-08-11 01:40 UTCEG score recompute
Show 46 more
  1. 2026-08-11 00:00 UTCEPSS rescore
  2. 2026-08-09 15:19 UTCEG score recompute
  3. 2026-08-09 13:46 UTCEPSS rescore
  4. 2026-08-09 03:53 UTCEG score recompute
  5. 2026-08-08 16:37 UTCEPSS rescore
  6. 2026-08-07 17:32 UTCEG score recompute
  7. 2026-08-06 18:36 UTCEG score recompute
  8. 2026-08-06 13:47 UTCEPSS rescore
  9. 2026-08-05 19:42 UTCEG score recompute
  10. 2026-08-05 19:17 UTCEPSS rescore
  11. 2026-08-04 15:42 UTCEG score recompute
  12. 2026-08-04 15:10 UTCEPSS rescore
  13. 2026-08-04 10:39 UTCEPSS rescore
  14. 2026-08-03 20:24 UTCEG score recompute
  15. 2026-08-03 10:36 UTCEPSS rescore
  16. 2026-08-02 07:46 UTCEG score recompute
  17. 2026-08-02 02:27 UTCEPSS rescore
  18. 2026-08-01 08:51 UTCEG score recompute
  19. 2026-08-01 04:16 UTCEPSS rescore
  20. 2026-07-30 23:54 UTCEG score recompute
  21. 2026-07-30 16:28 UTCEPSS rescore
  22. 2026-07-30 05:12 UTCEG score recompute
  23. 2026-07-30 01:30 UTCEPSS rescore
  24. 2026-07-29 03:26 UTCEG score recompute
  25. 2026-07-28 15:37 UTCEPSS rescore
  26. 2026-07-28 01:54 UTCEG score recompute
  27. 2026-07-26 20:13 UTCEG score recompute
  28. 2026-07-26 14:54 UTCEPSS rescore
  29. 2026-07-25 14:18 UTCEPSS rescore
  30. 2026-07-24 14:18 UTCEPSS rescore
  31. 2026-07-23 14:18 UTCEPSS rescore
  32. 2026-07-23 03:18 UTCEG score recompute
  33. 2026-07-22 14:08 UTCEPSS rescore
  34. 2026-07-21 15:25 UTCEPSS rescore
  35. 2026-07-20 17:08 UTCEPSS rescore
  36. 2026-07-19 14:31 UTCEPSS rescore
  37. 2026-07-19 14:31 UTCEPSS rescore
  38. 2026-07-19 02:29 UTCEPSS rescore
  39. 2026-07-18 10:04 UTCEPSS rescore
  40. 2026-07-16 22:57 UTCEG score recompute▲ 1.70
  41. 2026-07-16 17:03 UTCEPSS rescore
  42. 2026-07-16 04:26 UTCNVD updateCVSS v3 → 8.6 · severity → HIGH
  43. 2026-07-15 16:57 UTCEPSS rescore
  44. 2026-07-14 19:34 UTCEG score recompute▲ 6.90
  45. 2026-07-14 19:31 UTCMITRE cvelistV5CVSS v3 → 6.9 · CVSS v4 → 6.9
  46. 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 1% probability of exploitation in the next 30 days, which ranks it in the top 55.3% of all scored CVEs.
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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