CVE-2026-13502
antlr ANTLR4 Maven Plugin GrammarDependencies.java ObjectInputStream.readObject toctou
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.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
antlr ANTLR4 Maven Plugin GrammarDependencies.java ObjectInputStream.readObject toctou
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.
- Record
CVE-2026-13502- CVSS 4.0
- 2.0 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P - CVSS 3.1
- 4.5 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R - CVSS 3.0
- 4.5 Medium
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R - CVSS 2.0
- 3.5
AV:L/AC:H/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR - Weakness
- CWE-367, CWE-362
- Updated
- 2026-11-02
EUVDEUVD-2026-40000
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.
- Record
EUVD-2026-40000- CVSS 4.0
- 2.0 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-h73j-vjhq-j9vg
A flaw has been found in antlr ANTLR4 up to 4.13.2. This affects the function ObjectInputStream...
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.
- Record
GHSA-h73j-vjhq-j9vg- CVSS 4.0
- 1.1 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 4.5 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-362
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2026-13502- CVSS 4.0
- 1.1 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 4.5 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L - CVSS 2.0
- 3.5 Low
AV:L/AC:H/Au:S/C:P/I:P/A:P - Weakness
- CWE-362, CWE-367
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-13502
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.
- Record
DEBIAN-CVE-2026-13502- CVSS 4.0
- 1.1 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-13502
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.
- Record
UBUNTU-CVE-2026-13502- CVSS 4.0
- 1.1 Low
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P - CVSS 3.1
- 4.5 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-02
OSVCLSA-2026-1791457538 No score
TuxCare security update for org.antlr (3 CVEs)
TuxCare rebuilt 6 org.antlr packages to address 3 CVEs. Fixed in 4.13.0-tuxcare.1.
- Record
CLSA-2026-1791457538- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
org.antlr:antlr4TuxCare:Maven From an advisory covering 3 CVEs |
4.13.0 up to 4.13.0-tuxcare.1 | 4.13.0-tuxcare.1 |
org.antlr:antlr4-masterTuxCare:Maven From an advisory covering 3 CVEs |
4.13.0 up to 4.13.0-tuxcare.1 | 4.13.0-tuxcare.1 |
org.antlr:antlr4-maven-pluginTuxCare:Maven From an advisory covering 3 CVEs |
4.13.0 up to 4.13.0-tuxcare.1 | 4.13.0-tuxcare.1 |
org.antlr:antlr4-runtimeTuxCare:Maven From an advisory covering 3 CVEs |
4.13.0 up to 4.13.0-tuxcare.1 | 4.13.0-tuxcare.1 |
org.antlr:antlr4-runtime-testsuiteTuxCare:Maven From an advisory covering 3 CVEs |
4.13.0 up to 4.13.0-tuxcare.1 | 4.13.0-tuxcare.1 |
org.antlr:antlr4-tool-testsuiteTuxCare:Maven From an advisory covering 3 CVEs |
4.13.0 up to 4.13.0-tuxcare.1 | 4.13.0-tuxcare.1 |
antlr4Debian:12 |
All versions, plus listed versions 4.7.2-54.9.2-14.9.2-24.9.2-3 |
None known |
antlr4Debian:13 |
All versions, plus listed versions 4.9.2-3 |
None known |
antlr4Debian:14 |
All versions, plus listed versions 4.9.2-3 |
None known |
antlr4Ubuntu:16.04:LTS |
All versions, plus listed versions 4.5.1-14.5.1-2 |
None known |
Show 7 moreShow less
| Package | Affected | Fixed |
|---|---|---|
antlr4Ubuntu:18.04:LTS |
All versions, plus listed versions 4.5.3-24.7.2-1~18.04 |
None known |
antlr4Ubuntu:20.04:LTS |
All versions, plus listed versions 4.7.2-14.7.2-2 |
None known |
antlr4Ubuntu:22.04:LTS |
All versions, plus listed versions 4.7.2-5 |
None known |
antlr4Ubuntu:24.04:LTS |
All versions, plus listed versions 4.7.2-54.9.2-2 |
None known |
antlr4Ubuntu:25.10 |
All versions, plus listed versions 4.9.2-3 |
None known |
antlr4Ubuntu:26.10 |
All versions, plus listed versions 4.9.2-3build1 |
None known |
antlr4Ubuntu:26.04:LTS |
All versions, plus listed versions 4.9.2-34.9.2-3build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-13502 is a low vulnerability (CVSS 2.0) in Antlr Antlr4, published June 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.11%, the 1st percentile. No source names a fixed version.