CVE-2026-13501

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

Score 5.3 from GitHub Security Advisory (severity: LOW) published 2026-06-28. a secondary CVSS source baseline 5.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 5.3Exploit: Elevated riskExposed: 0

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

A security vulnerability has been detected in antlr ANTLR4 up to 4.13.2. Affected by this vulnerability is the function GoTarget of the file tool/src/org/antlr/v4/codegen/target/GoTarget.java of the component gofmt. The manipulation leads to command injection. The attack can only be performed from a local environment. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity53% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
65%
KEV
Not listed

Published

June 28, 2026

Last Modified

June 29, 2026

Advisory Details (1)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

antlr4_002_OS_Command_Injection_GoTarget_gofmt · Issue #6 · wooyun123/wooyun · GitHub

https://github.com/wooyun123/wooyun/issues/6

Vendor Advisories for CVE-2026-13501(1)

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

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
antlr44.7.2-5, 4.9.2-1, 4.9.2-2, 4.9.2-3——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
antlr44.7.2-5, 4.9.2-1, 4.9.2-2, 4.9.2-3——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
antlr44.9.2-3——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
antlr44.9.2-3——

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 73× 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 146 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-13501?
CVE-2026-13501 is a medium vulnerability published on June 28, 2026. A security vulnerability has been detected in antlr ANTLR4 up to 4.13.2. Affected by this vulnerability is the function GoTarget of the file tool/src/org/antlr/v4/codegen/target/GoTarget.java of the component gofmt. The manipulation leads to command injection. The attack can only be performed from…
When was CVE-2026-13501 disclosed?
CVE-2026-13501 was first published in the National Vulnerability Database on June 28, 2026, with the most recent update on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13501 actively exploited?
CVE-2026-13501 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 35.0% of all scored CVEs.
What is the CVSS score of CVE-2026-13501?
CVE-2026-13501 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-13501?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13501, 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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