CVE-2026-13502

MEDIUMPre-NVD 4.54.5—
EchelonGraph scoreMEDIUM confidence

Score 4.5 from GitHub Security Advisory (severity: LOW) published 2026-06-28. a secondary CVSS source baseline 4.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
4.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.5Exploit: Elevated riskExposed: 0

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

A flaw has been found in antlr ANTLR4 up to 4.13.2. This affects the function ObjectInputStream.readObject of the file antlr4-maven-plugin/src/main/java/org/antlr/mojo/antlr4/GrammarDependencies.java of the component Maven Plugin. This manipulation causes time-of-check time-of-use. The attack is restricted to local execution. A high degree of complexity is needed for the attack. It is indicated that the exploitability is difficult. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
4.5
EG Score
4.5(medium)
EG Risk
36(Track)
EG Risk 36/100SSVC: 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
Severity45% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
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_003_Unsafe_Java_Deserialization_Maven_Plugin · Issue #7 · wooyun123/wooyun · GitHub

https://github.com/wooyun123/wooyun/issues/7

Vendor Advisories for CVE-2026-13502(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 7× in last 7d / 42× 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 123 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-13502?
CVE-2026-13502 is a medium vulnerability published on June 28, 2026. A flaw has been found in antlr ANTLR4 up to 4.13.2. This affects the function ObjectInputStream.readObject of the file antlr4-maven-plugin/src/main/java/org/antlr/mojo/antlr4/GrammarDependencies.java of the component Maven Plugin. This manipulation causes time-of-check time-of-use. The attack is…
When was CVE-2026-13502 disclosed?
CVE-2026-13502 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-2026-13502 actively exploited?
CVE-2026-13502 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 98.5% of all scored CVEs.
What is the CVSS score of CVE-2026-13502?
CVE-2026-13502 has a CVSS v3 base score of 4.5 (NVD).
How do I remediate CVE-2026-13502?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13502, 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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