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UBUNTU-CVE-2026-15308
Severity: Type: vulnerabilityCVE-2026-15308
The incremental HTML parser (html.parser.HTMLParser) allows for CPU denial-of-service through repeated unterminated markup declarations when processing uncontrolled data.
EPSS 0.6%top 57%
UBUNTU-CVE-2026-15308
0
UnknownVulnerabilityCVE-2026-15308gcveosvubuntu-cve-2026-15308ubuntu-pro-14-04-ltsubuntu-pro-16-04-ltsubuntu-pro-18-04-ltsubuntu-pro-20-04-ltsubuntu-22-04-ltsubuntu-pro-22-04-ltsubuntu-24-04-ltsubuntu-26-04-lts
Published: 07/09/2026 (07/09/2026, 17:16:00 UTC)
Source: GCVE Database
Product: python2.7
Description
The incremental HTML parser (html.parser.HTMLParser) allows for CPU denial-of-service through repeated unterminated markup declarations when processing uncontrolled data.
CVSS v4.0
Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected software
python2.7
pkg:deb/ubuntu/[email protected]+esm29?arch=source&distro=esm-infra-legacy/trustyAffected versions
=2.7.5-8ubuntu3=2.7.5-8ubuntu4=2.7.6-2=2.7.6-2ubuntu1=2.7.6-3=2.7.6-3ubuntu1=2.7.6-4=2.7.6-4ubuntu1=2.7.6-5=2.7.6-7=2.7.6-8=2.7.6-8ubuntu0.2=2.7.6-8ubuntu0.3=2.7.6-8ubuntu0.4=2.7.6-8ubuntu0.5=2.7.6-8ubuntu0.6+esm2=2.7.6-8ubuntu0.6+esm3=2.7.6-8ubuntu0.6+esm5=2.7.6-8ubuntu0.6+esm6=2.7.6-8ubuntu0.6+esm7=2.7.6-8ubuntu0.6+esm8=2.7.6-8ubuntu0.6+esm9=2.7.6-8ubuntu0.6+esm10=2.7.6-8ubuntu0.6+esm11=2.7.6-8ubuntu0.6+esm12=2.7.6-8ubuntu0.6+esm13=2.7.6-8ubuntu0.6+esm14=2.7.6-8ubuntu0.6+esm15=2.7.6-8ubuntu0.6+esm16=2.7.6-8ubuntu0.6+esm17=2.7.6-8ubuntu0.6+esm18=2.7.6-8ubuntu0.6+esm20=2.7.6-8ubuntu0.6+esm21=2.7.6-8ubuntu0.6+esm22=2.7.6-8ubuntu0.6+esm24=2.7.6-8ubuntu0.6+esm25=2.7.6-8ubuntu0.6+esm26=2.7.6-8ubuntu0.6+esm28=2.7.6-8ubuntu0.6+esm29
python3.4
pkg:deb/ubuntu/[email protected]~14.04.7+esm20?arch=source&distro=esm-infra-legacy/trustyAffected versions
=3.4~b1-0ubuntu3=3.4~b1-4ubuntu4=3.4~b1-4ubuntu6=3.4~b1-5ubuntu2=3.4~b2-1=3.4~b3-1ubuntu1=3.4~rc1-1build1=3.4~rc2-1=3.4~rc3-0ubuntu1=3.4.0-1=3.4.0-2ubuntu1=3.4.0-2ubuntu1.1=3.4.3-1ubuntu1~14.04.1=3.4.3-1ubuntu1~14.04.3=3.4.3-1ubuntu1~14.04.4=3.4.3-1ubuntu1~14.04.5=3.4.3-1ubuntu1~14.04.6=3.4.3-1ubuntu1~14.04.7=3.4.3-1ubuntu1~14.04.7+esm2=3.4.3-1ubuntu1~14.04.7+esm4=3.4.3-1ubuntu1~14.04.7+esm6=3.4.3-1ubuntu1~14.04.7+esm7=3.4.3-1ubuntu1~14.04.7+esm8=3.4.3-1ubuntu1~14.04.7+esm10=3.4.3-1ubuntu1~14.04.7+esm11=3.4.3-1ubuntu1~14.04.7+esm12=3.4.3-1ubuntu1~14.04.7+esm13=3.4.3-1ubuntu1~14.04.7+esm14=3.4.3-1ubuntu1~14.04.7+esm15=3.4.3-1ubuntu1~14.04.7+esm16=3.4.3-1ubuntu1~14.04.7+esm17=3.4.3-1ubuntu1~14.04.7+esm19=3.4.3-1ubuntu1~14.04.7+esm20
python3.5
pkg:deb/ubuntu/[email protected]~16.04.4~14.04.1+esm10?arch=source&distro=esm-infra-legacy/trustyAffected versions
=3.5.2-2ubuntu0~16.04.4~14.04.1=3.5.2-2ubuntu0~16.04.4~14.04.1+esm1=3.5.2-2ubuntu0~16.04.4~14.04.1+esm3=3.5.2-2ubuntu0~16.04.4~14.04.1+esm4=3.5.2-2ubuntu0~16.04.4~14.04.1+esm5=3.5.2-2ubuntu0~16.04.4~14.04.1+esm6=3.5.2-2ubuntu0~16.04.4~14.04.1+esm7=3.5.2-2ubuntu0~16.04.4~14.04.1+esm8=3.5.2-2ubuntu0~16.04.4~14.04.1+esm9=3.5.2-2ubuntu0~16.04.4~14.04.1+esm10
python2.7
pkg:deb/ubuntu/[email protected]~16.04.18+esm20?arch=source&distro=esm-infra-legacy/xenialAffected versions
=2.7.10-4ubuntu1=2.7.10-4ubuntu2=2.7.11-2=2.7.11-3=2.7.11-4=2.7.11-6=2.7.11-7=2.7.11-7ubuntu1=2.7.12-1~16.04=2.7.12-1ubuntu0~16.04.1=2.7.12-1ubuntu0~16.04.2=2.7.12-1ubuntu0~16.04.3=2.7.12-1ubuntu0~16.04.4=2.7.12-1ubuntu0~16.04.8=2.7.12-1ubuntu0~16.04.9=2.7.12-1ubuntu0~16.04.11=2.7.12-1ubuntu0~16.04.12=2.7.12-1ubuntu0~16.04.13=2.7.12-1ubuntu0~16.04.14=2.7.12-1ubuntu0~16.04.16=2.7.12-1ubuntu0~16.04.18=2.7.12-1ubuntu0~16.04.18+esm1=2.7.12-1ubuntu0~16.04.18+esm2=2.7.12-1ubuntu0~16.04.18+esm3=2.7.12-1ubuntu0~16.04.18+esm4=2.7.12-1ubuntu0~16.04.18+esm5=2.7.12-1ubuntu0~16.04.18+esm6=2.7.12-1ubuntu0~16.04.18+esm7=2.7.12-1ubuntu0~16.04.18+esm8=2.7.12-1ubuntu0~16.04.18+esm9=2.7.12-1ubuntu0~16.04.18+esm10=2.7.12-1ubuntu0~16.04.18+esm11=2.7.12-1ubuntu0~16.04.18+esm12=2.7.12-1ubuntu0~16.04.18+esm13=2.7.12-1ubuntu0~16.04.18+esm15=2.7.12-1ubuntu0~16.04.18+esm16=2.7.12-1ubuntu0~16.04.18+esm17=2.7.12-1ubuntu0~16.04.18+esm18=2.7.12-1ubuntu0~16.04.18+esm19=2.7.12-1ubuntu0~16.04.18+esm20
python3.5
pkg:deb/ubuntu/[email protected]~16.04.13+esm23?arch=source&distro=esm-infra-legacy/xenialAffected versions
=3.5.0-3=3.5.0-3ubuntu1=3.5.1~rc1-2ubuntu1=3.5.1-1=3.5.1-2=3.5.1-3=3.5.1-5=3.5.1-6ubuntu1=3.5.1-6ubuntu2=3.5.1-9ubuntu1=3.5.1-10=3.5.2-2~16.01=3.5.2-2~16.04=3.5.2-2ubuntu0~16.04.1=3.5.2-2ubuntu0~16.04.2=3.5.2-2ubuntu0~16.04.3=3.5.2-2ubuntu0~16.04.4=3.5.2-2ubuntu0~16.04.5=3.5.2-2ubuntu0~16.04.8=3.5.2-2ubuntu0~16.04.9=3.5.2-2ubuntu0~16.04.10=3.5.2-2ubuntu0~16.04.11=3.5.2-2ubuntu0~16.04.12=3.5.2-2ubuntu0~16.04.13=3.5.2-2ubuntu0~16.04.13+esm1=3.5.2-2ubuntu0~16.04.13+esm2=3.5.2-2ubuntu0~16.04.13+esm3=3.5.2-2ubuntu0~16.04.13+esm5=3.5.2-2ubuntu0~16.04.13+esm6=3.5.2-2ubuntu0~16.04.13+esm7=3.5.2-2ubuntu0~16.04.13+esm8=3.5.2-2ubuntu0~16.04.13+esm9=3.5.2-2ubuntu0~16.04.13+esm10=3.5.2-2ubuntu0~16.04.13+esm11=3.5.2-2ubuntu0~16.04.13+esm12=3.5.2-2ubuntu0~16.04.13+esm13=3.5.2-2ubuntu0~16.04.13+esm14=3.5.2-2ubuntu0~16.04.13+esm15=3.5.2-2ubuntu0~16.04.13+esm16=3.5.2-2ubuntu0~16.04.13+esm17=3.5.2-2ubuntu0~16.04.13+esm18=3.5.2-2ubuntu0~16.04.13+esm19=3.5.2-2ubuntu0~16.04.13+esm20=3.5.2-2ubuntu0~16.04.13+esm21=3.5.2-2ubuntu0~16.04.13+esm22=3.5.2-2ubuntu0~16.04.13+esm23
python2.7
pkg:deb/ubuntu/[email protected]~18.04ubuntu1.13+esm14?arch=source&distro=esm-infra/bionicAffected versions
=2.7.14-2ubuntu2=2.7.14-4=2.7.14-6=2.7.14-7=2.7.14-8=2.7.15~rc1-1=2.7.15~rc1-1ubuntu0.1=2.7.15-4ubuntu4~18.04=2.7.15-4ubuntu4~18.04.1=2.7.15-4ubuntu4~18.04.2=2.7.17-1~18.04=2.7.17-1~18.04ubuntu1=2.7.17-1~18.04ubuntu1.1=2.7.17-1~18.04ubuntu1.2=2.7.17-1~18.04ubuntu1.3=2.7.17-1~18.04ubuntu1.5=2.7.17-1~18.04ubuntu1.6=2.7.17-1~18.04ubuntu1.7=2.7.17-1~18.04ubuntu1.8=2.7.17-1~18.04ubuntu1.10=2.7.17-1~18.04ubuntu1.11=2.7.17-1~18.04ubuntu1.13=2.7.17-1~18.04ubuntu1.13+esm1=2.7.17-1~18.04ubuntu1.13+esm2=2.7.17-1~18.04ubuntu1.13+esm3=2.7.17-1~18.04ubuntu1.13+esm4=2.7.17-1~18.04ubuntu1.13+esm5=2.7.17-1~18.04ubuntu1.13+esm6=2.7.17-1~18.04ubuntu1.13+esm7=2.7.17-1~18.04ubuntu1.13+esm8=2.7.17-1~18.04ubuntu1.13+esm10=2.7.17-1~18.04ubuntu1.13+esm11=2.7.17-1~18.04ubuntu1.13+esm12=2.7.17-1~18.04ubuntu1.13+esm13=2.7.17-1~18.04ubuntu1.13+esm14
python3.6
pkg:deb/ubuntu/[email protected]~18.04ubuntu1.13+esm9?arch=source&distro=esm-infra/bionicAffected versions
=3.6.3-1ubuntu1=3.6.4~rc1-1=3.6.4~rc1-2=3.6.4-1=3.6.4-2=3.6.4-3build1=3.6.4-4=3.6.5~rc1-1=3.6.5-3=3.6.6-1~18.04=3.6.7-1~18.04=3.6.8-1~18.04.1=3.6.8-1~18.04.2=3.6.8-1~18.04.3=3.6.9-1~18.04=3.6.9-1~18.04ubuntu1=3.6.9-1~18.04ubuntu1.1=3.6.9-1~18.04ubuntu1.3=3.6.9-1~18.04ubuntu1.4=3.6.9-1~18.04ubuntu1.6=3.6.9-1~18.04ubuntu1.7=3.6.9-1~18.04ubuntu1.8=3.6.9-1~18.04ubuntu1.9=3.6.9-1~18.04ubuntu1.10=3.6.9-1~18.04ubuntu1.12=3.6.9-1~18.04ubuntu1.13=3.6.9-1~18.04ubuntu1.13+esm1=3.6.9-1~18.04ubuntu1.13+esm2=3.6.9-1~18.04ubuntu1.13+esm3=3.6.9-1~18.04ubuntu1.13+esm4=3.6.9-1~18.04ubuntu1.13+esm5=3.6.9-1~18.04ubuntu1.13+esm6=3.6.9-1~18.04ubuntu1.13+esm7=3.6.9-1~18.04ubuntu1.13+esm8=3.6.9-1~18.04ubuntu1.13+esm9
python3.7
pkg:deb/ubuntu/[email protected]~18.04.2+esm10?arch=source&distro=esm-apps/bionicAffected versions
=3.7.0~a2-1=3.7.0~a3-1=3.7.0~a3-2=3.7.0~a3-3=3.7.0~a4-1=3.7.0~b1-1=3.7.0~b1-1build1=3.7.0~b2-1=3.7.0~b3-1=3.7.0-1~18.04=3.7.1-1~18.04=3.7.3-2~18.04.1=3.7.5-2~18.04=3.7.5-2~18.04.4=3.7.5-2ubuntu1~18.04.2=3.7.5-2ubuntu1~18.04.2+esm1=3.7.5-2ubuntu1~18.04.2+esm2=3.7.5-2ubuntu1~18.04.2+esm3=3.7.5-2ubuntu1~18.04.2+esm4=3.7.5-2ubuntu1~18.04.2+esm5=3.7.5-2ubuntu1~18.04.2+esm6=3.7.5-2ubuntu1~18.04.2+esm7=3.7.5-2ubuntu1~18.04.2+esm8=3.7.5-2ubuntu1~18.04.2+esm9=3.7.5-2ubuntu1~18.04.2+esm10
python3.8
pkg:deb/ubuntu/[email protected]~18.04.2+esm10?arch=source&distro=esm-apps/bionicAffected versions
=3.8.0-3~18.04=3.8.0-3~18.04.1=3.8.0-3ubuntu1~18.04.2=3.8.0-3ubuntu1~18.04.2+esm1=3.8.0-3ubuntu1~18.04.2+esm2=3.8.0-3ubuntu1~18.04.2+esm3=3.8.0-3ubuntu1~18.04.2+esm4=3.8.0-3ubuntu1~18.04.2+esm5=3.8.0-3ubuntu1~18.04.2+esm6=3.8.0-3ubuntu1~18.04.2+esm7=3.8.0-3ubuntu1~18.04.2+esm8=3.8.0-3ubuntu1~18.04.2+esm9=3.8.0-3ubuntu1~18.04.2+esm10
python3.8
pkg:deb/ubuntu/[email protected]~20.04.18+esm6?arch=source&distro=esm-infra/focalAffected versions
=3.8.0-1=3.8.0-2=3.8.0-3=3.8.0-4=3.8.0-5=3.8.1-2ubuntu3=3.8.2~rc1-1ubuntu1=3.8.2-1=3.8.2-1ubuntu1=3.8.2-1ubuntu1.1=3.8.2-1ubuntu1.2=3.8.5-1~20.04=3.8.5-1~20.04.2=3.8.5-1~20.04.3=3.8.10-0ubuntu1~20.04=3.8.10-0ubuntu1~20.04.1=3.8.10-0ubuntu1~20.04.2=3.8.10-0ubuntu1~20.04.4=3.8.10-0ubuntu1~20.04.5=3.8.10-0ubuntu1~20.04.6=3.8.10-0ubuntu1~20.04.7=3.8.10-0ubuntu1~20.04.8=3.8.10-0ubuntu1~20.04.9=3.8.10-0ubuntu1~20.04.10=3.8.10-0ubuntu1~20.04.11=3.8.10-0ubuntu1~20.04.12=3.8.10-0ubuntu1~20.04.13=3.8.10-0ubuntu1~20.04.14=3.8.10-0ubuntu1~20.04.15=3.8.10-0ubuntu1~20.04.16=3.8.10-0ubuntu1~20.04.17=3.8.10-0ubuntu1~20.04.18=3.8.10-0ubuntu1~20.04.18+esm1=3.8.10-0ubuntu1~20.04.18+esm2=3.8.10-0ubuntu1~20.04.18+esm3=3.8.10-0ubuntu1~20.04.18+esm4=3.8.10-0ubuntu1~20.04.18+esm5=3.8.10-0ubuntu1~20.04.18+esm6
python2.7
pkg:deb/ubuntu/[email protected]~20.04.7+esm9?arch=source&distro=esm-apps/focalAffected versions
=2.7.17~rc1-1=2.7.17-1=2.7.17-1ubuntu5=2.7.17-1ubuntu6=2.7.18~rc1-2=2.7.18-1~20.04=2.7.18-1~20.04.1=2.7.18-1~20.04.1+esm1=2.7.18-1~20.04.3=2.7.18-1~20.04.3+esm1=2.7.18-1~20.04.4=2.7.18-1~20.04.4+esm1=2.7.18-1~20.04.4+esm2=2.7.18-1~20.04.4+esm3=2.7.18-1~20.04.5=2.7.18-1~20.04.5+esm1=2.7.18-1~20.04.5+esm2=2.7.18-1~20.04.6=2.7.18-1~20.04.6+esm1=2.7.18-1~20.04.7=2.7.18-1~20.04.7+esm3=2.7.18-1~20.04.7+esm4=2.7.18-1~20.04.7+esm6=2.7.18-1~20.04.7+esm7=2.7.18-1~20.04.7+esm8=2.7.18-1~20.04.7+esm9
python3.9
pkg:deb/ubuntu/[email protected]~20.04.1+esm10?arch=source&distro=esm-apps/focalAffected versions
=3.9.0~rc1-1~20.04=3.9.0-5~20.04=3.9.5-3~20.04.1=3.9.5-3ubuntu0~20.04.1=3.9.5-3ubuntu0~20.04.1+esm1=3.9.5-3ubuntu0~20.04.1+esm2=3.9.5-3ubuntu0~20.04.1+esm3=3.9.5-3ubuntu0~20.04.1+esm4=3.9.5-3ubuntu0~20.04.1+esm5=3.9.5-3ubuntu0~20.04.1+esm6=3.9.5-3ubuntu0~20.04.1+esm7=3.9.5-3ubuntu0~20.04.1+esm8=3.9.5-3ubuntu0~20.04.1+esm9=3.9.5-3ubuntu0~20.04.1+esm10
python3.10
pkg:deb/ubuntu/[email protected]~22.04.16?arch=source&distro=jammyAffected versions
=3.10.0-2=3.10.0-3=3.10.0-4=3.10.0-5=3.10.0-5build1=3.10.1-1=3.10.1-2=3.10.2-1=3.10.2-5=3.10.2-7=3.10.3-1=3.10.4-3=3.10.4-3ubuntu0.1=3.10.6-1~22.04=3.10.6-1~22.04.1=3.10.6-1~22.04.2=3.10.6-1~22.04.2ubuntu1=3.10.6-1~22.04.2ubuntu1.1=3.10.12-1~22.04.2=3.10.12-1~22.04.3=3.10.12-1~22.04.4=3.10.12-1~22.04.5=3.10.12-1~22.04.6=3.10.12-1~22.04.7=3.10.12-1~22.04.8=3.10.12-1~22.04.9=3.10.12-1~22.04.10=3.10.12-1~22.04.11=3.10.12-1~22.04.12=3.10.12-1~22.04.13=3.10.12-1~22.04.14=3.10.12-1~22.04.15=3.10.12-1~22.04.16
python2.7
pkg:deb/ubuntu/[email protected]+esm8?arch=source&distro=esm-apps/jammyAffected versions
=2.7.18-8build1=2.7.18-13=2.7.18-13ubuntu1=2.7.18-13ubuntu1.1=2.7.18-13ubuntu1.1+esm2=2.7.18-13ubuntu1.2=2.7.18-13ubuntu1.2+esm1=2.7.18-13ubuntu1.2+esm2=2.7.18-13ubuntu1.2+esm3=2.7.18-13ubuntu1.3=2.7.18-13ubuntu1.3+esm1=2.7.18-13ubuntu1.4=2.7.18-13ubuntu1.4+esm1=2.7.18-13ubuntu1.5=2.7.18-13ubuntu1.5+esm2=2.7.18-13ubuntu1.5+esm3=2.7.18-13ubuntu1.5+esm5=2.7.18-13ubuntu1.5+esm6=2.7.18-13ubuntu1.5+esm7=2.7.18-13ubuntu1.5+esm8
python3.11
pkg:deb/ubuntu/[email protected]~rc1-1~22.04.1~esm9?arch=source&distro=esm-apps/jammyAffected versions
=3.11.0~rc1-1~22.04=3.11.0~rc1-1~22.04.1~esm1=3.11.0~rc1-1~22.04.1~esm2=3.11.0~rc1-1~22.04.1~esm3=3.11.0~rc1-1~22.04.1~esm4=3.11.0~rc1-1~22.04.1~esm5=3.11.0~rc1-1~22.04.1~esm6=3.11.0~rc1-1~22.04.1~esm7=3.11.0~rc1-1~22.04.1~esm8=3.11.0~rc1-1~22.04.1~esm9
python3.12
pkg:deb/ubuntu/[email protected]?arch=source&distro=nobleAffected versions
=3.12.0-1=3.12.0-5=3.12.0-6=3.12.0-7=3.12.1-2=3.12.2-1=3.12.2-4build3=3.12.2-4build4=3.12.2-5ubuntu3=3.12.3-1=3.12.3-1ubuntu0.1=3.12.3-1ubuntu0.2=3.12.3-1ubuntu0.3=3.12.3-1ubuntu0.4=3.12.3-1ubuntu0.5=3.12.3-1ubuntu0.6=3.12.3-1ubuntu0.7=3.12.3-1ubuntu0.8=3.12.3-1ubuntu0.9=3.12.3-1ubuntu0.10=3.12.3-1ubuntu0.11=3.12.3-1ubuntu0.12=3.12.3-1ubuntu0.13=3.12.3-1ubuntu0.15
python3.14
pkg:deb/ubuntu/[email protected]?arch=source&distro=resoluteAffected versions
=3.14.0-1=3.14.0-2=3.14.0-4=3.14.2-1=3.14.3-1=3.14.3-2=3.14.3-3=3.14.3-5=3.14.4-1=3.14.4-1ubuntu0.1
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-15308
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:Pro:14.04:LTS","Ubuntu:Pro:16.04:LTS","Ubuntu:Pro:18.04:LTS","Ubuntu:Pro:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:Pro:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 4.0
Threat ID: 6a58b4eb68715ace43dafd2e
Added to database: 07/16/2026, 10:39:39 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 21
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