CVE-2023-27781: jpegoptim v1.5.2 was discovered to contain a heap overflow in the optimize function at jpegoptim.c.

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HIGH 7.8DOWNGRADE

CVE-2023-27781 is a high-severity flaw (CVSS 7.8) affecting jpegoptim. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

jpegoptim v1.5.2 was discovered to contain a heap overflow in the optimize function at jpegoptim.c.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-787
Published	2023-03-15
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: jpegoptim project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-03-15 15:15 UTCPublished CVE record published
2026-06-17 05:45 UTCUpdated Record last modified

jpegoptim project jpegoptim DOWNGRADE

Affected: 1.5.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5.2

1. Check installed version

apt-cache policy jpegoptim || rpm -q jpegoptim || jpegoptim --version

2. No fixed release: DOWNGRADE to a release before 1.5.2 (Debian / Ubuntu)

apt-cache madison jpegoptim sudo apt install jpegoptim=<VERSION_BEFORE_1.5.2> sudo apt-mark hold jpegoptim

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list jpegoptim sudo dnf downgrade jpegoptim-<VERSION_BEFORE_1.5.2> sudo dnf versionlock add jpegoptim

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-27781?

jpegoptim: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2023-27781 being exploited?

CVE-2023-27781 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-27781 affect?

CVE-2023-27781 affects jpegoptim. Severity is high (CVSS 7.8). jpegoptim v1.5.2 was discovered to contain a heap overflow in the optimize function at jpegoptim.c.

How urgent is CVE-2023-27781?

Priority 41/100. High severity; Public exploit reference

Related CVEs

CVE-2022-32325 MEDIUM 6.5 DOWNGRADE MITIGATE JPEGOPTIM v1.4.7 was discovered to contain a segmentation violation which is caused by a READ memory access at

References

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