# CVE-2026-104356: PictShare < 3.7.1 Predictable Delete Code via rand()

Status: published. Published: 2026-10-01. Updated: 2026-11-08.

PictShare before version 3.7.1 contains a weak randomness vulnerability where the getRandomString() function uses the non-cryptographic rand() PRNG to generate the delete_code authorization token in src/inc/core.php. Attackers can predict or infer the PRNG state to guess valid delete_code values and perform unauthorized deletion of hosted files without needing to read the code from the info endpoint.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/HaschekSolutions/pictshare/commit/ce5fc474e89769efeae25fee763894bcce3412e3
- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/HaschekSolutions/pictshare/releases/tag/v3.7.1

## Affected products and versions

- HaschekSolutions / pictshare (HaschekSolutions/pictshare): ≥ 2.0.0; < 3.7.1 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.2 (high); CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 5.9 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: 0.38% as of 2026-11-08; percentile 32.21%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-338

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/HaschekSolutions/pictshare/commit/ce5fc474e89769efeae25fee763894bcce3412e3 (CNA: VulnCheck; issue-tracking, release-notes, patch)

- https://github.com/HaschekSolutions/pictshare/releases/tag/v3.7.1 (CNA: VulnCheck; patch, release-notes)

- https://www.vulncheck.com/advisories/pictshare-predictable-delete-code-via-rand (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-104356; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-104356; retrieved 2026-11-08; source updated Not reported

Revision: 724a7bf031bff6558ef53d7af2f433b5e8178439ddb844c22c7409dfdae6cb5f

Canonical: https://y2.dev/cve/CVE-2026-104356

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