CVE-2022-24894
A public proof of concept exists; no exploitation attested.
- Published2023-02-03
- Fixed in6.2.6 · 6.1.12 · 6.0.20 · 5.4.20 · 5.4.2 · 4.4.50
- WeaknessCWE-285
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Symfony is a PHP framework for web and console applications and a set of reusable PHP components. The Symfony HTTP cache system, acts as a reverse proxy: It caches entire responses (including headers) and returns them to the clients. In a recent change in the `AbstractSessionListener`, the response might contain a `Set-Cookie` header. If the Symfony HTTP cache system is enabled, this response might bill stored and return to the next clients. An attacker can use this vulnerability to retrieve the victim's session. This issue has been patched and is available for branch 4.4.
Timeline
dates in UTC- 2023-02-0322:15CVE publishedNVD
- 2026-10-2319:23First public proof of conceptPoC-in-GitHub
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-24894?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-24894?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
NVD · OSV| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 6.2 | ≥ 6.2.0, < 6.2.6 | 6.2.6 | NVD · OSV |
| 6.1 | ≥ 6.1.0, < 6.1.12 | 6.1.12 | NVD · OSV |
| 6.0 | ≥ 6.0.0, < 6.0.20 | 6.0.20 | NVD · OSV |
| 5.x | ≥ 5.0.0, < 5.4.20 | 5.4.20 | OSV |
| 5.x | ≥ 5.0.0, < 5.4.2 | 5.4.2 | NVD · OSV |
| 4.4 | ≥ 2.0.0, < 4.4.50 | 4.4.50 | NVD · OSV |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Fix
- Update Symfony to 6.2.6 · 6.1.12 · 6.0.20 · 5.4.20 · 5.4.2 · 4.4.50
Advisories and patches
- github.comPatch
Detection
read 2026-10-23 19:23 UTC- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
Sources
- CISA-ADPSSVC decisionnone2025-03-10
- OpenCVESSVC decisionnone—
- CNACVSS 3.15.9read 2026-10-23
- NVDCVSS 3.18.8read 2026-10-23
- CNAweakness (CWE)CWE-285read 2026-10-23
- FIRST EPSSEPSS score4.0 %2026-10-22
- PoC-in-GitHubproof of concept1read 2026-10-23
- OSVaffected packages—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Published
- 2023-02-03
- Last Modified
- 2026-06-17
- NVD status
- Analyzed
Frequently asked questions
What is CVE-2022-24894?
Is CVE-2022-24894 actively exploited?
What is the CVSS score for CVE-2022-24894?
Running Symfony? Hear about its next vulnerability
Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».
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Go further
- Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.