CVE-2026-52761

MEDIUMNVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under NVD CVSS v3. EPSS exploit probability: 0.4% (32nd percentile of EPSS-scored CVEs). 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
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 5.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 through 3.0.15, the t:utf8toUnicode transformation in src/actions/transformations/utf8_to_unicode.cc produces wrong output on i386 architecture because snprintf uses sizeof on a char pointer rather than the length of the unicode buffer, allowing rules that use this transformation to be bypassed on i386 architecture. This issue is fixed in version 3.0.16.

CVSS v3
5.3
EG Score
5.3MEDIUMmedium confidence
EG Risk
39
EG Risk 39/100CISA SSVC

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
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
CISA SSVC: Track at low or medium mission impact; Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.4%
EPSS %ILE
33rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 10, 2026

Last Modified

July 14, 2026

Advisory Details (3)

Auto-updated Jul 10, 2026
Patch available. Sources: github_release, github, github_commit.
githubMentions a patch (unverified)

Transformation utf8toUnicode produces wrong output on i386 architecture · Advisory · owasp-modsecurity/ModSecurity · GitHub

https://github.com/owasp-modsecurity/ModSecurity/security/advisories/GHSA-qjgm-7gp4-f8qq
github_release Patch Available

v3.0.16

Patch available: owasp-modsecurity/ModSecurity v3.0.16

https://github.com/owasp-modsecurity/ModSecurity/releases/tag/v3.0.16
github_commit

commit edcd010814e2 (owasp-modsecurity/ModSecurity)

Fix landed in owasp-modsecurity/ModSecurity commit edcd010814e2 — awaiting tagged release

https://github.com/owasp-modsecurity/ModSecurity/commit/edcd010814e234d46e2ec55a0f1078ff9d3032e4

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
modsecurity3.0.10-1 ... 3.0.9-1 (15 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
modsecurity3.0.10-1 ... 3.0.9-1+deb12u2 (12 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
modsecurity3.0.14-1, 3.0.14-1+deb13u1, 3.0.15-1, 3.0.16-1
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
modsecurity3.0.14-1, 3.0.15-1
  • every version up to 3.0.16-1: fixed in 3.0.16-1
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 30× 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 125 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-52761?
CVE-2026-52761 is a medium vulnerability published on July 10, 2026. ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. From 3.0.0 through 3.0.15, the t:utf8toUnicode transformation in src/actions/transformations/utf8tounicode.cc produces wrong output on i386 architecture because snprintf uses sizeof on a…
When was CVE-2026-52761 disclosed?
CVE-2026-52761 was first published on July 10, 2026, with the most recent update on July 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52761 actively exploited?
CVE-2026-52761 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (33rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-52761?
CVE-2026-52761 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-52761?
A fix for CVE-2026-52761 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-52761

Explore →

Is Your Infrastructure Affected by CVE-2026-52761?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs