CVE-2007-1399: Stack-based buffer overflow in the zip:// URL wrapper in PECL ZIP 1.8.3 and earlier, as bundled with PHP 5.2.0

Q: How do I fix CVE-2007-1399?

php: downgrade or apply the listed mitigation; php zip: upgrade to 1.8.4. Exact commands for each OS are on this page.

Q: Is CVE-2007-1399 being exploited?

CVE-2007-1399 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2007-1399 affect?

CVE-2007-1399 affects php, php zip. Severity is critical (CVSS 9.8). Stack-based buffer overflow in the zip:// URL wrapper in PECL ZIP 1.8.3 and earlier, as bundled with PHP 5.2.0 and 5.2.1, allows remote attackers to execute arbitrary code via a long zip:// URL, as demonstrated by actively triggering URL ac

Q: How urgent is CVE-2007-1399?

Priority 69/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEDOWNGRADEUPGRADE

CVE-2007-1399 is a critical-severity flaw (CVSS 9.8) affecting php, php zip. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Stack-based buffer overflow in the zip:// URL wrapper in PECL ZIP 1.8.3 and earlier, as bundled with PHP 5.2.0 and 5.2.1, allows remote attackers to execute arbitrary code via a long zip:// URL, as demonstrated by actively triggering URL access from a remote PHP interpreter via avatar upload or blog pingback.

Why this priority

Critical severity
EPSS top 3%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	20.1% (top 3%)
CISA exploited list	No
Published	2007-03-10
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: php · pierrejoye

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-03-10 22:19 UTCPublished CVE record published
2026-06-16 22:37 UTCUpdated Record last modified

php php DOWNGRADE

Affected: 5.2.0 · 5.2.1

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.2.0

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 5.2.0 (Debian / Ubuntu)

apt-cache madison php sudo apt install php=<VERSION_BEFORE_5.2.0> sudo apt-mark hold php

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

dnf --showduplicates list php sudo dnf downgrade php-<VERSION_BEFORE_5.2.0> sudo dnf versionlock add php

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.

pierrejoye php zip UPGRADE

Affected: < 1.8.4

Fixed in: 1.8.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy php-zip || rpm -q php-zip || php-zip --version

2. UPGRADE to 1.8.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade php-zip

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade php-zip

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Exploit-DB: PHP 5.2.0 / PHP with PECL ZIP 1.8.3 - 'zip://' URL Wrapper Buffer Overflow

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-2007-1399?

php: downgrade or apply the listed mitigation; php zip: upgrade to 1.8.4. Exact commands for each OS are on this page.

Is CVE-2007-1399 being exploited?

CVE-2007-1399 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-2007-1399 affect?

CVE-2007-1399 affects php, php zip. Severity is critical (CVSS 9.8). Stack-based buffer overflow in the zip:// URL wrapper in PECL ZIP 1.8.3 and earlier, as bundled with PHP 5.2.0 and 5.2.1, allows remote attackers to execute arbitrary code via a long zip:// URL, as demonstrated by actively triggering URL ac

How urgent is CVE-2007-1399?

Priority 69/100. Critical severity; EPSS top 3%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

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References

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