CVE-2026-26740 Memory corruption in n/a
High 8.2
Published
Updated
Check this codebase for CVE-2026-26740 and fix it if it is affected.
What it is: CVE-2026-26740 is a high-severity memory corruption vulnerability in n/a, published on 18 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26740 exists.
Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-26740/ (Markdown: https://insights.sbomify.com/CVE-2026-26740/index.md)
A remote attacker can cause a denial of service in applications using giflib by triggering a buffer overflow in the Graphic Control Extension handling.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-26740?
CVE-2026-26740 is a high-severity memory corruption vulnerability in n/a, published on 18 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Buffer Overflow vulnerability in giflib v.5.2.2 allows a remote attacker to cause a denial of service via the EGifGCBToExtension overwriting an existing Graphic Control Extension block without validating its allocated size.
Weakness: CWE-787
Which versions are affected by CVE-2026-26740?
It affects 1 product.
Linux distribution packages (40)
giflib AlmaLinux:10 | All versions | 5.2.1-25.el10_2 |
giflib-devel AlmaLinux:10 | All versions | 5.2.1-25.el10_2 |
giflib AlmaLinux:8 | All versions | 5.1.4-5.el8_10 |
giflib-devel AlmaLinux:8 | All versions | 5.1.4-5.el8_10 |
giflib AlmaLinux:9 | All versions | 5.2.1-10.el9_8.2 |
giflib-devel AlmaLinux:9 | All versions | 5.2.1-10.el9_8.2 |
giflib Red Hat:enterprise_linux:10.2 | All versions | 0:5.2.1-25.el10_2 |
giflib-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:5.2.1-25.el10_2 |
giflib-debugsource Red Hat:enterprise_linux:10.2 | All versions | 0:5.2.1-25.el10_2 |
giflib-devel Red Hat:enterprise_linux:10.2 | All versions | 0:5.2.1-25.el10_2 |
giflib-utils-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:5.2.1-25.el10_2 |
giflib Red Hat:enterprise_linux:8::appstream | All versions | 0:5.1.4-5.el8_10 |
giflib-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:5.1.4-5.el8_10 |
giflib-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:5.1.4-5.el8_10 |
giflib-utils-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:5.1.4-5.el8_10 |
giflib-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:5.1.4-5.el8_10 |
giflib-debugsource Red Hat:enterprise_linux:8::crb | All versions | 0:5.1.4-5.el8_10 |
giflib-devel Red Hat:enterprise_linux:8::crb | All versions | 0:5.1.4-5.el8_10 |
giflib-utils-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:5.1.4-5.el8_10 |
giflib Red Hat:enterprise_linux:9::appstream | All versions | 0:5.2.1-10.el9_8.2 |
giflib-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:5.2.1-10.el9_8.2 |
giflib-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:5.2.1-10.el9_8.2 |
giflib-utils-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:5.2.1-10.el9_8.2 |
giflib-debuginfo Red Hat:enterprise_linux:9::crb | All versions | 0:5.2.1-10.el9_8.2 |
giflib-debugsource Red Hat:enterprise_linux:9::crb | All versions | 0:5.2.1-10.el9_8.2 |
giflib-devel Red Hat:enterprise_linux:9::crb | All versions | 0:5.2.1-10.el9_8.2 |
giflib-utils-debuginfo Red Hat:enterprise_linux:9::crb | All versions | 0:5.2.1-10.el9_8.2 |
giflib Red Hat:enterprise_linux_eus:10.0 | All versions | 0:5.2.1-22.el10_0.2 |
giflib-debuginfo Red Hat:enterprise_linux_eus:10.0 | All versions | 0:5.2.1-22.el10_0.2 |
giflib-debugsource Red Hat:enterprise_linux_eus:10.0 | All versions | 0:5.2.1-22.el10_0.2 |
giflib-devel Red Hat:enterprise_linux_eus:10.0 | All versions | 0:5.2.1-22.el10_0.2 |
giflib-utils-debuginfo Red Hat:enterprise_linux_eus:10.0 | All versions | 0:5.2.1-22.el10_0.2 |
giflib Red Hat:rhel_aus:8.4::appstream | All versions | 0:5.1.4-3.el8_4.2 |
giflib-debuginfo Red Hat:rhel_aus:8.4::appstream | All versions | 0:5.1.4-3.el8_4.2 |
giflib-debugsource Red Hat:rhel_aus:8.4::appstream | All versions | 0:5.1.4-3.el8_4.2 |
giflib-utils-debuginfo Red Hat:rhel_aus:8.4::appstream | All versions | 0:5.1.4-3.el8_4.2 |
giflib Red Hat:rhel_aus:8.6::appstream | All versions | 0:5.1.4-3.el8_6.2 |
giflib-debuginfo Red Hat:rhel_aus:8.6::appstream | All versions | 0:5.1.4-3.el8_6.2 |
giflib-debugsource Red Hat:rhel_aus:8.6::appstream | All versions | 0:5.1.4-3.el8_6.2 |
giflib-utils-debuginfo Red Hat:rhel_aus:8.6::appstream | All versions | 0:5.1.4-3.el8_6.2 |
Products include Giflib Project Giflib.
How do I fix CVE-2026-26740?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-26740 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-26740 exists.
Other vulnerabilities in n/a
Sources
Also known as ALPINE-CVE-2026-26740, ALSA-2026:33501, ALSA-2026:33502, ALSA-2026:33503, BELL-CVE-2026-26740, CLEANSTART-2026-IJ74212 and 31 more.