PT-2026-20644 · Open Babel+1 · Open Babel+1

Oneafter · Published 2026-01-01 · Updated 2026-03-27 · CVE-2026-2705

Positive Technologies (AI Summary)

CVSS v2.0

9.4

High

Base vector

AV:N/AC:L/Au:N/C:C/I:N/A:C

Name of the Vulnerable Software and Affected Versions Open Babel versions prior to 3.1.2

Description A flaw exists in Open Babel up to version 3.1.1 related to an out-of-bounds read issue. The issue is located within the OBAtom::SetFormalCharge function in the include/openbabel/atom.h library, specifically within the MOL2 File Handler component. This issue is potentially exploitable remotely. The exploit is publicly available.

Recommendations Update to a version later than 3.1.1.

Exploit

Fix

Buffer Overflow

Out of bounds Read

Weakness Enumeration

CWE-119

CWE-125

Related Identifiers

BDU:2026-05710

CVE-2026-2705

Affected Products

Open Babel

Red Os

References · 21

• 🔥 https://github.com/openbabel/openbabel/issues/2848 · Exploit
• 🔥 https://github.com/oneafter/0128/blob/main/ob2/repro.mol2 · Exploit
• https://github.com/openbabel/openbabel/pull/2862 · Patch
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-2705 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-2705 · Security Note
• https://osv.dev/vulnerability/CVE-2026-2705 · Vendor Advisory
• https://github.com/VedantMadane/openbabel/commit/e23a224b8fd9d7c2a7cde9ef4ec6afb4c05aa08a · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-2705 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-2705 · Security Note
• https://ubuntu.com/security/CVE-2026-2705 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-2705 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-05710 · Security Note
• https://redos.red-soft.ru/search/?iblock_id=24&q=CVE-2026-2705 · Note
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-openbabel-cve-2026-2705-8.0 · Note
• https://vuldb.com/?ctiid.346651 · Note