CVE-2026-7259

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.5 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 90% 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
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

A fix is available — apply it.

In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a mismatch between encoding lists in Oniguruma and mbfl leads to  a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
10%
KEV
Not listed

Published

May 10, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated Jun 12, 2026
Patch available. Sources: github.
github Patch Available

Null pointer dereference in php_mb_check_encoding() via mb_ereg_search_init() · Advisory · php/php-src · GitHub

https://github.com/php/php-src/security/advisories/GHSA-wm6j-2649-pv75

Vendor Advisories for CVE-2026-7259(3)

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

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuphp8.5-zip (8.5.4-0ubuntu1.1) @ resolute2026-08-23ubuntu
redhatphp-0:8.0.30-6.el9_82026-06-30redhat
redhatphp-0:8.3.31-1.el10_22026-06-04redhat

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
php8.28.2.10-1 ... 8.2.7-1~deb12u1 (26 versions)8.2.31-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
php8.48.4.11-1, 8.4.16-1, 8.4.16-1~deb13u1, 8.4.20-18.4.21-1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
php8.48.4.11-1, 8.4.16-1, 8.4.16-1~deb13u1, 8.4.20-1, 8.4.21-1~deb13u18.4.21-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(1)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 7× in last 7d / 59× 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 164 total refreshes for this CVE.

  1. 2026-08-24 14:18 UTCEPSS rescore
  2. 2026-08-23 18:48 UTCEG score recompute
  3. 2026-08-23 18:48 UTCVendor advisory
  4. 2026-08-23 00:19 UTCEPSS rescore
  5. 2026-08-21 23:49 UTCEPSS rescore
  6. 2026-08-20 22:56 UTCEPSS rescore
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-17 13:47 UTCEPSS rescore
  11. 2026-08-17 11:24 UTCEG score recompute
  12. 2026-08-17 11:24 UTCVendor advisory
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 04:30 UTCEG score recompute
  16. 2026-08-16 04:30 UTCVendor advisory
  17. 2026-08-16 02:15 UTCEPSS rescore
  18. 2026-08-15 01:31 UTCEPSS rescore
  19. 2026-08-15 01:26 UTCVendor advisory
  20. 2026-08-14 03:04 UTCEG score recompute
  21. 2026-08-14 03:04 UTCVendor advisory
  22. 2026-08-13 22:00 UTCEPSS rescore
  23. 2026-08-12 21:50 UTCEG score recompute
  24. 2026-08-12 21:50 UTCVendor advisory
  25. 2026-08-12 13:51 UTCEPSS rescore
Show 75 more
  1. 2026-08-11 23:32 UTCEG score recompute
  2. 2026-08-11 23:32 UTCVendor advisory
  3. 2026-08-11 13:43 UTCEPSS rescore
  4. 2026-08-11 01:13 UTCEG score recompute
  5. 2026-08-11 01:13 UTCVendor advisory
  6. 2026-08-11 00:00 UTCEPSS rescore
  7. 2026-08-10 00:37 UTCEG score recompute
  8. 2026-08-10 00:37 UTCVendor advisory
  9. 2026-08-09 13:47 UTCEPSS rescore
  10. 2026-08-09 02:19 UTCEG score recompute
  11. 2026-08-09 02:19 UTCVendor advisory
  12. 2026-08-08 16:37 UTCEPSS rescore
  13. 2026-08-07 18:50 UTCEG score recompute
  14. 2026-08-07 18:50 UTCVendor advisory
  15. 2026-08-06 20:22 UTCEG score recompute
  16. 2026-08-06 20:22 UTCVendor advisory
  17. 2026-08-06 13:47 UTCEPSS rescore
  18. 2026-08-05 22:03 UTCEG score recompute
  19. 2026-08-05 22:03 UTCVendor advisory
  20. 2026-08-05 19:17 UTCEPSS rescore
  21. 2026-08-05 19:17 UTCEPSS rescore
  22. 2026-08-04 15:10 UTCEPSS rescore
  23. 2026-08-04 10:39 UTCEPSS rescore
  24. 2026-08-03 23:13 UTCEG score recompute
  25. 2026-08-03 23:13 UTCVendor advisory
  26. 2026-08-03 10:36 UTCEPSS rescore
  27. 2026-08-03 00:55 UTCVendor advisory
  28. 2026-08-02 02:36 UTCEG score recompute
  29. 2026-08-02 02:36 UTCVendor advisory
  30. 2026-08-02 02:27 UTCEPSS rescore
  31. 2026-07-30 16:28 UTCEPSS rescore
  32. 2026-07-30 01:30 UTCEPSS rescore
  33. 2026-07-28 15:37 UTCEPSS rescore
  34. 2026-07-27 14:14 UTCEPSS rescore
  35. 2026-07-26 14:54 UTCEPSS rescore
  36. 2026-07-26 08:25 UTCEG score recompute
  37. 2026-07-26 08:25 UTCVendor advisory
  38. 2026-07-25 14:18 UTCEPSS rescore
  39. 2026-07-24 14:18 UTCEPSS rescore
  40. 2026-07-23 14:18 UTCEPSS rescore
  41. 2026-07-23 14:18 UTCEPSS rescore
  42. 2026-07-23 03:22 UTCEG score recompute
  43. 2026-07-22 14:08 UTCEPSS rescore
  44. 2026-07-22 14:08 UTCEPSS rescore
  45. 2026-07-21 15:25 UTCEPSS rescore
  46. 2026-07-21 15:25 UTCEPSS rescore
  47. 2026-07-20 17:08 UTCEPSS rescore
  48. 2026-07-19 14:31 UTCEPSS rescore
  49. 2026-07-19 02:29 UTCEPSS rescore
  50. 2026-07-18 10:04 UTCEPSS rescore
  51. 2026-07-16 17:03 UTCEPSS rescore
  52. 2026-07-15 02:00 UTCEPSS rescore
  53. 2026-07-13 22:31 UTCEPSS rescore
  54. 2026-07-13 06:13 UTCEPSS rescore
  55. 2026-07-12 05:46 UTCEPSS rescore
  56. 2026-07-09 19:10 UTCEPSS rescore
  57. 2026-07-09 19:10 UTCEPSS rescore
  58. 2026-07-08 15:16 UTCEPSS rescore
  59. 2026-07-08 15:16 UTCEPSS rescore
  60. 2026-07-07 13:46 UTCEPSS rescore
  61. 2026-07-07 13:46 UTCEPSS rescore
  62. 2026-07-06 16:27 UTCEPSS rescore
  63. 2026-07-06 16:27 UTCEPSS rescore
  64. 2026-07-06 02:23 UTCEPSS rescore
  65. 2026-07-06 02:23 UTCEPSS rescore
  66. 2026-07-05 02:31 UTCEPSS rescore
  67. 2026-07-05 02:30 UTCEPSS rescore
  68. 2026-07-04 06:31 UTCEPSS rescore
  69. 2026-07-04 06:31 UTCEPSS rescore
  70. 2026-07-01 15:07 UTCEPSS rescore
  71. 2026-06-30 23:22 UTCEPSS rescore
  72. 2026-06-29 14:06 UTCEPSS rescore
  73. 2026-06-28 14:07 UTCEPSS rescore
  74. 2026-06-28 08:54 UTCVendor advisory
  75. 2026-06-28 04:56 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-7259?
CVE-2026-7259 is a medium vulnerability published on May 10, 2026. In PHP versions 8.2. before 8.2.31, 8.3. before 8.3.31, 8.4. before 8.4.21, and 8.5. before 8.5.6, a mismatch between encoding lists in Oniguruma and mbfl leads to a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when…
When was CVE-2026-7259 disclosed?
CVE-2026-7259 was first published in the National Vulnerability Database on May 10, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-7259 actively exploited?
CVE-2026-7259 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 90.0% of all scored CVEs.
What is the CVSS score of CVE-2026-7259?
CVE-2026-7259 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-7259?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-7259, 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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