CVE-2018-5269

Reachable Assertion in OpenCV.

5.5 MediumFix available

In OpenCV 3.3.1, an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

1.38%Up 0.3 points since Apr 14, 2021

What each source reports

NVD Score used 5.5

In OpenCV 3.3.1, an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: CVE-2018-5269
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness: CWE-617
Updated: 2026-11-02

CVE List No score

In OpenCV 3.3.1, an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: CVE-2018-5269
Updated: 2026-11-02

EUVDEUVD-2021-2178 No score

In OpenCV 3.3.1, an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: EUVD-2021-2178
Updated: 2026-11-03

GitHub AdvisoriesGHSA-89rj-5ggj-3p9p 5.5

Reachable Assertion in OpenCV.

In OpenCV 3.3.1 (corresponds with OpenCV-Python 3.3.1.11), an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: GHSA-89rj-5ggj-3p9p
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-617
Updated: 2026-11-02

OSV 5.5

In OpenCV 3.3.1, an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: CVE-2018-5269
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-5269 5.5

In OpenCV 3.3.1, an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: DEBIAN-CVE-2018-5269
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

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OSVGHSA-89rj-5ggj-3p9p 5.5

Reachable Assertion in OpenCV.

In OpenCV 3.3.1 (corresponds with OpenCV-Python 3.3.1.11), an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: GHSA-89rj-5ggj-3p9p
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness: CWE-617
Updated: 2026-11-02

OSVPYSEC-2026-2812 5.5

Reachable Assertion in OpenCV.

In OpenCV 3.3.1 (corresponds with OpenCV-Python 3.3.1.11), an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: PYSEC-2026-2812
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVPYSEC-2026-703 5.5

Reachable Assertion in OpenCV.

In OpenCV 3.3.1 (corresponds with OpenCV-Python 3.3.1.11), an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: PYSEC-2026-703
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-5269 5.5

In OpenCV 3.3.1, an assertion failure happens in cv::RBaseStream::setPos in modules/imgcodecs/src/bitstrm.cpp because of an incorrect integer cast.

Record: UBUNTU-CVE-2018-5269
CVSS 3.1: 5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 3.0: 5.5 MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`opencv-python` PyPI	through 3.3.1.11	3.4.1.15
`opencv-contrib-python` PyPI	through 3.3.1.11	3.4.1.15
`opencv` Debian:12	before 3.2.0+dfsg-6	3.2.0+dfsg-6
`opencv` Debian:13	before 3.2.0+dfsg-6	3.2.0+dfsg-6
`opencv` Debian:14	before 3.2.0+dfsg-6	3.2.0+dfsg-6
`opencv` Debian:7	before 2.3.1-11+deb7u4, plus listed versions 2.3.1-112.3.1-11+deb7u12.3.1-11+deb7u22.3.1-11+deb7u3	2.3.1-11+deb7u4
`opencv` Debian:8	before 2.4.9.1+dfsg-1+deb8u2, plus listed versions 2.4.9.1+dfsg-12.4.9.1+dfsg-1+deb8u1	2.4.9.1+dfsg-1+deb8u2
`opencv` Debian:9	before 2.4.9.1+dfsg1-2+deb9u1, plus listed versions 2.4.9.1+dfsg1-2	2.4.9.1+dfsg1-2+deb9u1
`opencv-python` PyPI	before 3.4.1.15, plus listed versions 3.4.0.14	3.4.1.15
`opencv-contrib-python` PyPI	before 3.4.1.15	3.4.1.15
`opencv` Ubuntu:16.04:LTS	before 2.4.9.1+dfsg-1.5ubuntu1.1, plus listed versions 2.4.9+dfsg-1ubuntu62.4.9.1+dfsg-1.2ubuntu12.4.9.1+dfsg-1.3ubuntu12.4.9.1+dfsg-1.5ubuntu1	2.4.9.1+dfsg-1.5ubuntu1.1
`opencv` Ubuntu:18.04:LTS	before 3.2.0+dfsg-4ubuntu0.1, plus listed versions 3.1.0+dfsg1-1~exp1ubuntu33.2.0+dfsg-33.2.0+dfsg-43.2.0+dfsg-4build13.2.0+dfsg-4build2	3.2.0+dfsg-4ubuntu0.1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-5269 is a medium vulnerability (CVSS 5.5) in Opencv, published January 8, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.38%, the 72nd percentile. Fixed in opencv-python 3.4.1.15.

References

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